« first day (2160 days earlier)      last day (2213 days later) » 

6:47 AM
@M.A.R.ಠ_ಠ how are you able to review close votes on your mobile phone? Isn't that uncomfortable?
 
 
1 hour later…
8:11 AM
@GaurangTandon I bought premium
@orthocresol I had no idea how to respond to your silence, so I simply didn't.
 
@M.A.R.ಠ_ಠ yea stackexchange is American so should be $$ not €€
 
@M.A.R.ಠ_ಠ flagged as spam
 
8:27 AM
@AvnishKabaj (SE + Iran)/2 = Europe
Who the F flagged that?! It's a fake number I made up.
 
Loong said that he flagged it aaaaaandddddd I had never flagged a chat message before sooooo
......
 
@M.A.R.ಠ_ಠ Someone seriously flagged that?
 
@Loong yeah, I was suspended
Thanks
For unsuspending me
This is not awkward
 
sigh
 
@AvnishKabaj I think you and I need to have a little talk over that corner
 
8:34 AM
Sorry?
 
Too late. Kills @Avnish with a gun with one of those funny silencers
@AvnishKabaj jokes aside, I once asked pH13 to kick for science so I shouldn't object to your flag for science
All good :)
Unless you didn't do it for science
 
I am a man of science
@M.A.R.ಠ_ಠ thanx
 
 
2 hours later…
10:24 AM
@M.A.R.ಠ_ಠ huh, I don't get it? :/
 
@GaurangTandon I don't have another choice
It's not that annoying though
Just let the Stockholm syndrome kick in
 
@M.A.R.ಠ_ಠ I tried on mobile, but the font sizes are way off and very awkward to work with
 
@Abcd Dude that's such a sad question. The OP is asking for "specific enthalpy" instead, the answer poster doesn't know TeX, and the second answer has only copied ChemGuide. It is far less substantial than what I am asking. In fact, that question should be closed as a duplicate of this one, not the other way around. — Gaurang Tandon 9 hours ago
Everything is so sad. SO SAD Ehehehhheee that's me sobbing
 
10:51 AM
hehe, yeah if you look at the other question, it feels like a lifeless patch of land blown over by hot desert winds
 
 
1 hour later…
12:08 PM
Is the scaling of DFT dependent upon the functional in any way?
Trying to write my diss and know absolutely nothing about DFT lel
I know that the diagonalisation of the Hamiltonian is O(n^3)
I found this: scicomp.stackexchange.com/questions/5515/… but it doesn't address my situation
which is B3LYP using gaussians
 
 
3 hours later…
3:28 PM
@Gau changing "doubt" with "confusion" doesn't help. You can have confusion, but you can't have one
I love prescriptivism
It makes you right and other people wrong
Of course, you can have a confusion, but not in the way you're using it
What the hell do you people have against "question"?!
And I'm supposed to be the irrational guy here
 
@M.A.R.ಠ_ಠ Any alternatives to that?
 
@Abcd "inquiry, query, problem" etc.
 
Okay.
 
For what it's worth, some English people hate the countable "doubt" enough you'd be inviting a downvote or two.
 
@M.A.R.ಠ_ಠ I'm not sure if I recall doing that. I'm well aware of Martin's buzzwords. Which post are you talking about?
 
3:37 PM
@GaurangTandon not the title . . . I just VTC'd something as a dupe of your something and I noticed it
 
Ok then
 
4:04 PM
0
Q: Road to chemistry science

QwertoI'm a mathematician with no background in chemistry and I'm very interested in the field of physical chemistry. Do you think I can directly start to study a physical chemistry book? If yes, do you have some books to suggest?

The first step is to capitalize "i", de-capitalize "chemistry" and punctuate properly. :/
 
From now on, I'll stop checking SE on mobile. This will reduce my frequency, but I cannot continue any longer at such a great level of inconvenience. These hands are much more accustomed to a keyboard and a mouse than a handicapped UI... <rant over>
 
@GaurangTandon Can you explain proton sponges? Or do you have some link?
 
 
1 hour later…
5:32 PM
Is there a further stabilising effect from a buffer solution? — J.G. 12 mins ago
What does this even mean?
 
@orthocresol does a buffer solution stop them from fighting, and help resolve the situation?
 
@orthocresol can a buffer solution solve modern warfare
and bring a lasting peace
 
@orthocresol It prevents the explosion after drinking water.
 
OK, different opinions. We gotta solve this on meta
 
@Loong Apparently it really didn't work, as expected.
 
5:43 PM
@Loong lemme guess, you predicted life cannot happen
 
5:57 PM
20 hours ago, by orthocresol
RIP
 
@Loong that's vague because I dunno what I should be ripping
0
A: Difference between solubility and dissolution?

manahil tanveersolubility: the capacity of solute to be dissolved in a given amount of solvent (how many moles of solute are dissolved) solutes solubility is always questioned it is a thermodynamical process its unit is mol/kg dessolution: rate of solute dissolve in a solution(how fast the solute diss...

Check for plagiarism. Kthxbye
@ortho the flagger doesn't seem to have stopped. I wouldn't have complained if it wasn't too much, and the volume seems to have decreased, but it's still a bit excessive
 
6:14 PM
@obackhouse In general, no: the formal scaling is $N_{\text{AO}}^{4}$ due to the Fock build
However, if you screen the integrals, this is reduced so that diagonalizing the Fock matrix (Hamiltonian) is still the most expensive part: $N_{\text{AO}}^{3}$
 
The idea is if they weren't there, I would have reviewed 20 questions that were reasonably recent.
The idea is also interrupting @penta
 
sigh
@Abcd can you please not flag so many old posts for closure. People are getting a little annoyed, as you can see directly above.
 
@obackhouse If you do double-hybrid DFT, you take on the scaling of MP2, specifically the AO-to-MO transformation, $N_{\text{AO}}N_{\text{occ}}^{2}N_{\text{virt}}^{2}$
 
Haha interrupting worked
 
There is also the case of non-local dispersion functionals...I will try and figure that out, but they're very expensive
 
6:21 PM
@orthocresol gasp giggle chuckle giggle snort snicker snort
 
Ok, a non-local functional simply scales quadratically wrt integration grid points, rather than linearly as in most functionals. I know we usually ignore the cost of the quadrature, but it can become expensive even though it doesn't depend on the basis. You probably don't need to know that.
</done>
 
7:28 PM
thanks @pentavalentcarbon
My observations showed $N^{3.63}$ ish, using SMP 4 cores on various sizes of water clusters
obviously the degree of parallelisation makes it hard to see the true scaling
I also forced all symmetry and reorientation off which may have caused the screening to be less helpful
 
 
1 hour later…
8:40 PM
Agreed on all points; you can also see how varying the screening threshold changes the timing, if the package allows. For example, this is roughly ints_tolerance in Psi4 and thresh in Q-Chem.
 
9:38 PM
@orthocresol Okay, sure though I had reduced it already. I'll rather post them in Spring Cleaning from now.
 
10:15 PM
@Abcd it was still too much, preventing the newer questions from getting attention
 
10:37 PM
Okay, will take care from next time.
 
Pretty sure you shouldn't just answer homework questions here. — SFTP 41 mins ago
Ha, SFTP is awesome
@Abcd thanks :)
Oh, better with an emoji
😄😃🤣😂
 
11:29 PM
I have the power . BWAHAHAHHAHAHA!
 

« first day (2160 days earlier)      last day (2213 days later) »