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1:57 AM
Why is a rank $n = k + l$ spinor $\xi^{\alpha_1 \dots \alpha_k : \dot{\alpha}_1 \dots \dot{\alpha}_l }$ symmetric in the indices, or is it maybe only symmetric if you transform each index with the same $SL(2,C)$ transform and it's conjugate?
 
2:55 AM
Finally free for a few days. I am going to try to solve integral and associated things.
 
@BalarkaSen Did you ever finish reading?
 
I didn't read the rest as carefully but I did understand what you did. Lacan's theory classifies languages, or interpretation as language, as a sequence of signifiers (adjectives) which we use to understand the signified (noun). You drew a graph of iterative signifiers (adverbs of adverbs of ... of adverbs of adjectives) which approximates the signifier we want to understand.
An interpretation of the signifier is a path in the graph.
 
Why are you calling signifieds nouns?
 
You're setting up an appropriate weight according to the original interpretation of such a graph, as intended by the author. Minimizing that path ("finding an interpretation that agrees with the intention of the author) with this weight is a travelling salesman-like problem
 
0
Q: What does "physical dimensions approaches the wavelength" mean exactly?

H. JenkinsI'm learning Electronics by my own. And I'm in stuck while reading a book after failed to understand the following paragraph in Chapter 1, Electric Circuits 10th by Nilsson : On the other hand, the propagation frequency of radio signals is on the order of 10^9 Hz.Thus the wavelength is 0.3 ...

 
3:05 AM
You showed it's NP-hard, concluding the death of the author theory.
 
@BalarkaSen Yeah!
Nice!
You get it!
 
@BernardoMeurer Oh, well, I mean I'm not restricting it to just nouns, but merely making an analogy with the theory of syntaxes.
 
Ah, yeah, alright :)
 
Signification is "like" assigning adjectives to nouns
 
Yeah
/me really likes semiotics
 
3:09 AM
Why the fuck are you writing these things
Is this for the philosophy course
 
It's for a literature course LOL
 
Jesus fucking christ
 
We had to write an analysis of Gulliver's Travels
But I didn't want to
So I did that and added that case study in the end
@BalarkaSen But this prof is okay with it, and she gets it
 
That's really nice, because this thing you wrote here is a strong 9
 
Do I get the yellow flannel?!
 
3:15 AM
You get the savage patrick yellow flannel
 
Woohoo
I was really happy with it tbh
 
I really really like it
 
I think it's a cool idea, and it joins some pretty bizarrely different topics
You're the only person who likes my shit, lol
Ryan thinks I'm insane
@BalarkaSen Have you hear Byrne's album "Everything That Happens Will Happen Today" ?
"Home" in that album is p good
 
Yup!
@BernardoMeurer Ryan is right.
But that doesn't mean this isn't a strong 9
 
3:20 AM
I like My Life in the Bush of Ghosts more tbh
 
Is that the one with Eno?
 
Mhm
Everything ... is also with Eno
 
Really? Spotify doesn't show him on the artist list
 
Oh it absolutely is. Strange
 
Well, nice
I like Eno
 
3:24 AM
I love him
 
I've been in a weird musical phase recently
Like
weirder than my usual weird
 
What are you listening to?
(ie how weird?)
 
Like "Uses a pig as an instrument in live performances" weird
That's my favorite track rn
"Just listen"
 
On it
 
hmmm wow!!!! So this is what hard means. Let me take a break and eat peanuts.
 
3:28 AM
I have no problem with pig as percussion instrument. One of my favorite musician, Scott Walker, beat up dead beef, uses fart noises, beats large wooden boxes (and many other things) as percussion.
 
@Cows That's what she said
 
LOL
 
Unfortunate coincidence of names
To be listened in full volume
 
On it
I have my whole setup going as well
 
3:32 AM
@BernardoMeurer This is good!!
I love this full atonality
 
I really, really, really fucking like it
He's so fucking good
he goes so intense in a live show in Montreal that in the middle of the song he just screams "Don't worry, I won't break it"
And then he breaks it
 
Lol
 
He's the lagoon santa if you haven't noticed
 
Yeah I figured. Absolute madlad
 
He's one of two great brazilian musicians who are albino
We got it all dawg
Also, @BalarkaSen, the whole show
 
3:40 AM
I think I'll do organic chemistry while listening to this shite lol
 
It's so gold
 
Thanks for this
 
It startes with some japanese hosts
It's like you're listening to something from the future
Also, did you hear about Slavoj? :(
 
Nope, what about him?
 
He's got Bell's Palsy
 
3:45 AM
Oh dear
 
Yeah :/
Nika called Jela for me to wish him a speedy recovery
She said he's doing well though
 
Good to hear
@BernardoMeurer I have been listening to some weird rap lately
Have you heard of Aesop Rock?
 
Have not
Sounds cool
 
That's the most iconic track from him
If you like this you'll probably like anything from him
 
That's nice, I already like it
I also really like this track
 
3:55 AM
I love MF DOOM, I listened to Mm Food a few days ago
Let's hear this
 
Mm Food is amazingly good IMHO
 
Can't disagree man
 
4:31 AM
0
Q: In the twin paradox, are some events lost to the observer turning around?

Marc DiNinoFrom what I understand of the twin paradox, the time difference in time can be accounted for when the twin on a rocket ship turns around/switches reference frames. Does that imply that, events that have occurred in this gap will be lost to the "younger twin"? Can this be extended to such extrem...

I think it should be theoretically possible to push the events into the infinite future, thus effectively they don't happen for that observer, but I suspect you can only do that near black holes
 
 
2 hours later…
6:26 AM
if $\omega_0 + \omega \gg |\omega_0 - \omega|$ then $\frac{1}{\omega_0 + \omega} \ll \frac{1}{ |\omega_0 - \omega|}$ — By Symmetry 11 hours ago
It's easy to misread the user name as part of the sentence...
 
7:23 AM
By Symmetry we can see that that is a profile link.
 
7.6/10
 
7.5
triggered
okay bye sleep sloop
 
gdnt
 
 
2 hours later…
8:57 AM
Mornin
 
Anonymous
ninroM
 
i have to do a long ass integration by parts but i don't wanna
 
I had to do that integral once
It was a fun two weeks
Man I'm looking at the thesis in my town
The one interesting thesis is more of a history of science thing
 
9:20 AM
> The rules of consent still apply when you've been drinking. Consent is not possible if someone doesn't have the capacity to provide it. Always ask yourself: "Am I in a position to ask for consent? And can the other person really give consent?"
My objection is: How can a drunkard being mentally awake enough to even ask themselves such questions?
Conclusion: The cocktail culture has to go, and be replaced with the mocktail culture where no one gets drunk, ever
Seriously FUCK ALCOHOL. Who's that smartass that give history the idea that ethanol is for oral consumption?!
 
Anonymous
It's being consumed since pre-historic times
 
Anonymous
Like water
 
9:43 AM
@Blue tastes better than water though :-)
 
Anonymous
@JohnRennie Plain alcohol tastes disgusting unless mixed with something :P
 
Anonymous
I almost spat out the first time
 
Anonymous
Some cocktails can be really good however
 
it's watery bitter, which is why cocktails can knock someone out so easily
because it masks that bitter taste
 
Anonymous
Last time I was at the airport I bought a few chocolate bars without realized they had a rum filling inside. After biting into it....I ran for the washroom. It's like the worst medicine you've ever had (Ever tried tasting the inside stuff of a capsule medicine?)
 
9:53 AM
well sometimes the capsule of my medicine melts prematurely and my mouth is swamped with some kind of plastic bittery stuff
 
@Blue I wouldn't advise drinking neat ethanol :-)
 
and I then drink a lot of water to flush that away
 
Anonymous
@Secret That plastic taste isn't half as bad
 
Anonymous
Just open the capsule with your hand
 
Anonymous
And lick inside
 
Anonymous
9:56 AM
The powder
 
Anonymous
(AT YOUR OWN RISK)
 
oooo, that happens back in high school when I got a cold, and out of curioisity, I open the capsule of my flu medicine and taste that powder
it's sharp bitter, slightly better than Huang Lian sacredlotus.com/go/chinese-herbs/substance/…;, though
trust me, that powder is nothing when you have taken a tiny bite on a piece of Huang Lian
 
Anonymous
I don't want to :P
 
Anonymous
Neem juice was enough of a nightmare for me
 
well, I only get to know what it taste like because back in those times there's a chinese medicine field trip thingy and the instructor allow us to try out the herbs
 
Anonymous
10:06 AM
I sort of miss the chemistry practical classes where I used to mix random chemicals to make new colors
 
Anonymous
Once had HCl up my throat
 
uh.... not the conc. stuff right?
(dilute I can understand why it will be possible)
 
Anonymous
Obvio XD
 
Anonymous
I'd be daed
 
Anonymous
Did get a teeny weeny hand burn once due to the conc stuff though
 
Anonymous
10:09 AM
It forms a yellowish scar
 
Anonymous
It faded off over time
 
O yeah, that reminds me back in an electrolysis class in high school, a tiny drop of the dilute sulfuric acid electrolyte end up on my fingers and my fingernail biting habit caused me to unintentionally found out what the acid taste like (metallic acidic)

and ooof, you gotta be glad that's not conc. sulfuric acid though, cause it burns even worse
 
Anonymous
10:22 AM
Is there any geometric way to visualize why column rank = row rank ?
 
Anonymous
Couldn't find any good answers on the net
 
Anonymous
Maybe it would be best to think in terms of dual spaces
 
It's an easy consequence of the rank-nullity
Though I have never seen it written out that way. I found that accidentally
in Mathematics, Sep 9 '17 at 19:58, by Balarka Sen
@LeakyNun Rank-nullity says for an mxn matrix, dim im A + dim ker A = n, yeah? Now im A is literally the column space of the matrix; that means dim C(A) + dim ker A = n. Alternatively you know dim R(A) + dim ker A = n (because R(A), the rowspace, is the orthocomplement of ker A).
 
Anonymous
10:46 AM
@BalarkaSen Okay. But how do you prove that dim R(A) + dim ker A = n without using rank nullity ?
 
16
Q: Why do universal constants have the values they do?

Ben CrowellThis is meant to be a generic question of the type that we get repeatedly on this site, in different versions: The origin of the value of speed of light The gravitational constant G theoretically? What if Planck's constant were smaller or bigger than it is? Why do universal constants have the...

This is so cute
as for that column rank stuff, I have yet to find a way to put both the space and dual space together in one picture to figure out why intuitively
 
@Blue It's written right there... R(A) is the orthocomplement of ker A in R^n
It's not a rank-nullity fact
 
Anonymous
@BalarkaSen I don't know any proof of that without using rank nullity
 
I don't know how to prove that using rank-nullity. It's a simple proof; if Av = 0 (i.e., v is in ker A) then by definition of matrix multiplication, dot product of v with rows of A are zero
So v is orthogonal to each row of A. I.e, v is in R(A)
Similarly show the other inclusion
It's a tautology
 
Anonymous
11:08 AM
@BalarkaSen I see. And why does dim(orthocomplement of ker (A))+dim(ker A) = n ?
 
Dimension of any vector subspace of R^n + dimension of it's orthocomplement = n
There is nothing special about ker A
You should try to prove that
 
Anonymous
I can think of a proof for $\Bbb{R}^{n}$. But I don't see the general case immediately
 
Anonymous
i.e. for any finite dimensional vector space $V$
 
Anonymous
I'll try
 
In a general vector space orthogonality doesn't make sense...
Although you can still prove that if $W_1, W_2 \subset V$ are vector subspaces such that $W_1 + W_2 = V$ and $W_1 \cap W_2 = \{0\}$ then $\dim W_1 + \dim W_2 = \dim V$
(W_1 + W_2 = V means every element of v of V can be written as v = w_1 + w_2 where w_i \in W_i for i = 1, 2)
 
Anonymous
11:22 AM
@BalarkaSen Why exactly? It isn't defined?
 
What is dot product in a general vector space? You need choice of an inner product
 
Anonymous
Yes, so we can define an inner product
 
You don't define an inner product. You choose one.
 
Anonymous
That's what I meant by define i.e. choose
 
There are many many many possible inner products a vector space can have
 
11:24 AM
tbh there is a canonical one
at least for finite dimensions
 
@Slereah No?
Complete garbage statement
 
r u d e
 
endure rudeness
dam son
 
Anonymous
So, okay for $\Bbb{R}^{n}$ I understand your proof anyway. Geometrically it still doesn't make much sense to me
 
im turning into a rapper
 
Anonymous
11:25 AM
It seems more of a result of how matrix multiplication works
 
"endure" is an anagram for rudene(ss)
 
yup
@Blue Well, geometrically row space and column space are related to image and kernel of the linear transformation corresponding to the matrix, where the relation is clear (by what I said)
Row space and column space in itself don't have a geometric meaning
I don't know a more pictorial interpretation
I'd be happy to look if you find one
@Slereah In any case to criticize your statement more constructively, there is a canonical inner product on a vector space if and only if you choose a basis
But there is no canonical basis on a vector space
So there is no canonical inner product on a vector space :P
The formalism is that R^n is not a vector space, but vector space with a choice of a basis (what we call the unit coordinate vectors)
Or at least, that's the formalism I like to keep in mind
 
Can I ask you a question
 
Me, or the room in general? Ask, don't ask to ask
 
@Akash.B As the room description says: Don't ask about asking, just ask.
 
11:36 AM
@ACuriousMind Get rekt
 
@BalarkaSen Have mercy, I just woke up :P
 
Okay thank you
 
Haha. Well good morning in that case :)
 
Oh we are in a time lag Its good afternoon for me
 
Well, it's noon here
 
11:39 AM
So it is for me. I was bidding ACuriousMind good morning, and it's probably afternoon there too, but let's simply define morning to be whenever you wake up
Nailed it
 
@BalarkaSen Yes, I've always thought that to be an excellent definition :)
 
@ACuriousMind I had been experimenting with tranquilizers for a while and finally successfully slept like a normal human being today under the effect of diazepam
 
Okay my question is yesterday I noticed that my shoes were red originally but under a blue light it turn into blue shoes so my question is what is the real color of my shoe ? and what may be the reason for this?
Okay bye
 
@BalarkaSen Well...temporarily good for you, I guess? (Diazepam is addictive in the long run, so that's not a permanent solution)
 
@Akash.B if your shoes reflected no blue light at all, then under a blue light they would look black.
So your shoes reflect mostly red light, but they also reflect a bit of blue light.
In white light most of the light reflected is red, so your shoes look red.
 
11:44 AM
@Akash.B The "color" of an object is the colors its reflects mixed together. If there is no red light falling on your shoes, they cannot reflect any red light, so you just see the small part of blue they reflect.
 
Anonymous
3
A: Looking for an intuitive explanation why the row rank is equal to the column rank for a matrix

Nick AlgerThis can also be understood in terms of the singular value decomposition. Although proving the SVD takes a bit of work, once proved it provides a more thorough intuition about what is going on. Geometrically, the SVD says that a matrix maps the unit (hyper-)sphere in the domain to a (hyper-)elli...

 
Anonymous
This makes some sense
 
Anonymous
@BalarkaSen
 
@Akash.B But when you use a blue bulb there is no red light present. Only blue light is present so only blue light is reflected, so the light you see reflected is blue.
 
@ACuriousMind Yeah I don't plan to take any more of it. Just needed to fix it because the cycle was so fucked it was psychologically stressful.
Especially because I have exams coming up
 
11:47 AM
Ah, gotcha
 
@Blue I don't see any geometric argument there. One of the answer seems to be proving it like I did
 
Anonymous
See Nick's answer
 
Anonymous
About SVD
 
I used to forcefully fix my cycle simply by skipping sleep in one night entirely when it became necessary
I'm actually surprised how easily I've adjusted to getting up early during the week
 
Anonymous
I used to fix my cycle by sleeping an extra 6 hours
 
11:49 AM
Although I wouldn't want to know how my days would go without coffee :P
 
@Blue That's kind of nice but the same argument, actually. And you don't need SVD to state it.
I like it
 
@Blue huh? The broken part of my cycle was usually that I'd wake up around 3 pm and go to bed at like 6 am. How am I supposed to sleep 6 more hours there and how's that gonna fix it?
 
@ACuriousMind That works for me but after many a meditations
If I do that usually my sleep cycle oscillates in alternative days where it's huge like 9 hours a day then 5 hours the next day
And if I end up getting tired at some point and fall asleep in the 5-hour day, I'm fucked again
Oh lord 6 am to 3 pm is the worst
I do that all the time
After all these days of breaking all boundaries of normal human sleep schedule I think I finally understand that my psychology works different in daytime and nighttime.
It's much more grim at the night-time and I think in different ways. Not saying I am not productive at the night but just differently
This is not ideal for the kind of work I have to do for the next few weeks (which is mostly preparing for various sort of exams). I think I am more creative in the sense of being able to solve problems in the day. Alternatively new, "deep" ideas come easier at night
 
Anonymous
@ACuriousMind During school I used to sleep at 4 am and wake at about 6 am (and managed the rest by sleeping in class :P). When I'd get a holiday I'd sleep at around 8pm in the evening and wake up around 3-4 am. That would shift my sleep timings a bit backward, so that I would feel sleepy at around 2 am, the next day, and thus keeping some studying time for the morning instead of late night study. (Basically shifting the sleep hours backward by a few hours)
 
Anonymous
Maybe your and my definition of "broken" sleep timings are different :P
 
12:02 PM
Yeah, yours is a different - but no less bad - kind of broken :D
 
Anonymous
The last two years of high school is indeed very strenuous for Indian kids
 
Anonymous
I can understand Balarka's situation
 
Anonymous
Gets a bit better in college :)
 
Anonymous
(Because you can skip classes whenever you want and you don't have f*88in JEE or entrance exams to appear for XD)
 
12:14 PM
f*88 ?
 
Hello guys What I should in order to be a good at mathamatics
 
@Akash.B Practice
 
any other option
 
Seriously. Practice is the number one way to get good at maths.
 
okay i get it
 
12:15 PM
Actually, practice is the number one way to get good at most things
 
I've been practising at being a layabout for decades and I am now an expert
2
 
It's useless if you're not interested though
 
is mathematics a trap
 
@BalarkaSen I agree :)
 
@Akash.B Absolutely :-)
 
12:17 PM
@ACuriousMind Only interesting people are allowed to do mathematics
 
why it said like that
 
@Akash.B perfectly respectable physics students start learning maths and before you know it they want to be mathematicians instead.
I'm talking about you @Danu :-)
And @ACuriousMind only escaped by leaving academia completely! :-)
 
@BalarkaSen Wouldn't that be nice :P
 
Maths is a bit like quicksand, only it's sometimes possible to escape from quicksand
 
What should I do in order to be a theoretical physicist?
 
12:20 PM
(Watch Rick and Morty)
3
 
Rick and morty?
 
@Akash.B Become a physicist first, worry about the theory part later
 
How to be it?
 
@Akash.B the key thing is to do what you enjoy doing
 
Can you please elaborate
 
12:22 PM
@JohnRennie I'm running a tally of people classifying it as an escape vs. a fall from grace. It's a close race ;P
 
If you love doing physics then do physics at school then physics at university then take it from there
@ACuriousMind :-)
 
oh
 
@ACuriousMind You're clearly loving it though - I'm exceedingly jealous!
While I love doing the nuclear engineering stuff most of the IT stuff I do these days is pretty routine. That's why I hang around here :-)
@Akash.B your profile says you're 14, so you have lots of time to decide where your interests lie.
 
Okay here is my other question why space is dark even though there are lot of stars in space ?
 
@JohnRennie Let's see what I say in a decade or two ;)
@Akash.B that's Olber's paradox
 
12:27 PM
I have decided to be an theoretical physicist
 
@ACuriousMind at the risk of (fraudulently) donning the wise old man hat, companies can always get clever students to do stuff. What they struggle to find are people good at planning and organising stuff. In ten years time you'll be either leading a team (of whatever size) or feeling pretty bored.
 
Olber's paradox full scientific terms i couldn't understand
 
@ACuriousMind it was when I got to the feeling pretty bored stage that I left Unilever Research.
@Akash.B suppose you look in a random direction into space. The question is whether the line you're looking along leads to a star.
 
@JohnRennie Ah, sure - if/when I reach that stage I'll probably go look for something else, too, but right now that's a far way off
 
@JohnRennie I wish it would be boring routine here just for one day.
 
12:31 PM
@ACuriousMind I love how they mention Poe's hypothesis there. Eureka: A Prose Poem is truly a masterpiece.
 
@Akash.B If the line you're looking along leads to a star then you see light. If the line you're looking along doesn't lead to a star then you see black.
@ACuriousMind everybody thinks management is boring. The reality is that (in the right company) it's the most intellectually taxing thing you can do. The really good managers have a fantastically fulfilling lifestyle and are very well paid.
Sadly I am not a really good manager ...
 
@JohnRennie It depends on the person. I've met two guys who were managers for a few years and then went back to full-time coding because they liked it much more
 
@ACuriousMind lots of people try it and fail - I did
 
@JohnRennie Sadly our managers are French.
 
@Loong Sacre bleu!
 
12:36 PM
That's the most important reason why all projects fail in this company.
 
@Loong that's a bit racist :-)
 
They have this philosophy of changing positions at least every three years.
Therefore, nobody is interested in finding long-term solutions.
just quick patches everywhere
Let someone else deal with the fallout.
I don't know how many billions that has cost us just at this site.
 
@Loong Given that you have alluded to working in the nuclear industry in the past, that's a...concerning choice of words :P
 
Glad to hear I qualify as perfectly respectable @JohnRennie
 
@Danu :-)
 
12:40 PM
@ACuriousMind I just thought the same. :-o Especially considering that we now have the nuclear fuel on site.
 
So what do you think, fall from (perfectly respectable) grace, or escape?
 
@Danu you're in danger of thinking that anything I say makes sense (this doesn't apply to food or laptops)
 
This kinda stuff is why I don’t like nuclear energy :P good in theory, but humans involved makes it waaay too scary
 
"Good in theory, but humans screw it up" - That's civilization in a nutshell.
 
Looking around here, I think you are not wrong.
 
12:43 PM
I heard similar things from someone working with Japanese nuclear plants
 
We all have a notion of perfection, and we tend to criticise our employers, friends, family, whatever, when they fall sort of it.
But companies understand that perfection is impossible. The aim is to be less imperfect than your competitors.
 
@Loong one of the EPRs?
 
@alarge yes
 
Moving managers every three years does have unfortunate side effects, but it's part of management training, and the few really good managers that emerge from th far side of it are like gold dust for the company.
That's why companies do it.
Even though everyone thinks it's a bad idea.
Life's like that ...
 
1:31 PM
Did somebody say Scott Walker? I do like After the lights go out.
 
I like his later works more.
Enemy is a good movie
 
There's some kind of "odd" stuff in his later works. I'm not so keen myself. But there again, I'm kind of a Yes Album type of guy. Or Wishbone Ash.
Gosh, it's quiet today. Anybody want to talk physics?
 
1:59 PM
Here's a few subjects: time, speed of light, gravity, history of QM and QED, gauge theory, photon, pair production, electron, positron, electromagnetism, magnets, monopoles, charge, mass, proton, neutrino, weak interaction, electroweak, nuclear force, neutron, antimatter, black holes, Hawking radiation, information paradox, firewall, dark matter, big bang, inflation, dark energy, edge of the universe, fate of the universe
 
2:17 PM
How about some music then? Such as Friends by Led Zeppelin.
Or The Brazilian by Genesis.
 
Do not expect any chat activity until 2 hours later, that's the problem of being in quiet periods
Currently I am busy doing the consent course module of my uni, but I would like to have some philosophy discussion if you don't mind
 
@Secret : sure thing. What would you like to talk about?
 
2:33 PM
I am not sure, you have any good topics? I only know I kinda want to leave ethics behind for now, cause that module I am doing has enough ethics to keep me busy already
 
No, I'm afraid not. I've talked philosophy plenty of times, but mainly when it's related to physics.
Ethics is do unto others as you would have others do unto you.
 
Ah, @lılostafa, what was that about airplanes you pinged me with a while back?
 
@ACuriousMind A question about the German word for Airplane factory (fortunately someone else answered :)
 
@lılostafa Ah, alrighty then :)
 
2:46 PM
Is anyone here familiar with Excel? I have two text files each of them have n lines
I want to merge the two files so that each line of the new file is the same lines of the two files put next to each other
In Linux paste does this
But in windows I thought maybe Excel can help
How can I merge two columns in Excel? couldn't find anything useful online :/
 
@Yashas Hi :)
 
vzn
← :) saw steely dan 2011 live aspen/ snowmass jazz festival rip becker setlist.fm/setlist/steely-dan/2011/… rollingstone.com/music/news/…
← :) 3x get the led out 2015-2017, red rocks redrocksonline.com/concerts-events/detail/get-the-led-9-21-2017
 
vzn
@JohnDuffield fyi someone turned up your amazon book on here awhile back, was a bit surprised. think you should get a website :)
 
@lılostafa : use copy and paste to get the two columns side by side, then set the formula for column C row 1 to =CONCAT(A1,B1). Then copy cell C1 to cells C2 thru Cn.
@vzn : I will. I have some material to put up.
 

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