@SirCumference I don't know about scipy but this is a common error in python generally if you do sqrt(x) and then try to convert the result to float, since if x is negative the result is complex not a float. Probably it's an overflow error like Slereah says so that something that scipy assumes is always positive suddenly gets negative.
"In 1850 the Swiss astronomer Wolf rolled one white and one red die 20,000 times, kept track of the results, and determined the frequency of each outcome (Bulmer 1967). Also, a certain nineteenth-century English biologist Weldon also rolled twelve dice 26,306 times and recorded the number of 5s and 6s (Fry 1928)."
I used to go rock climbing in my younger days, and I've done a lot of abseiling including down some very high buildings, but I've never done a bungee jump.
From what I heard since I've joined, I've understood that the purpose of stack was to make a knowledge repository but what if one day we document every single possible questions which could be asked? Would the site change policies if such a day came?
What are the restrictions on the basis set for the completeness relation to hold?
It surely can't be true for any basis set because that would imply that any set of vectors whose sum of outer products lead to a full-rank matrix is I (and I can give a counterexample to prove this wrong). So what are the conditions on the basis set so that the sum of outer products results in identity?
Is there a shortcut for bra and ket vectors in mathjax? I currently use | and langle/rangle command. It's too much to type and makes the raw code illegible.
Do non-normalizable solutions belong to Hilbert space?
I think no because it's isomorphic to L2 and you need to have square integral functions in L2. But now I am confused what are we doing when we are working with non-physical solutions like free particle. Aren't QM postulates being violated?
What is the underlying framework while working with non-normalizable systems like free particle?
The thing about bungie jumping is you know you are safe because thousands of other people have bungie jumped at the same place and not died. So while it's still scary it's fun scary not trouser wetting scary :-)
I used to go white water canoeing when I was younger. That could get pretty hairy. I actually got knocked out once when my head was bashed against a rock by the current.
@Azmuth the latest AMD processors are considerably better than Intel's 10th gen CPUs. It remains to be seen how they compare with the 11th gen CPUs that will be released next year.
At 60k rupees you have lots of choice. HP and Lenovo do great laptops at that price as well as Dell. That Dell laptop is very good, but to be honest all laptops are good these days.
@JohnRennie Yeah, might as well get the first 7 while they're free, even if you never read them really. The series gets really addictive as the books go on. It's another book I was kinda "meh" on until it takes a pretty sudden twist in book 1 that hooked me. By book 2 I was in the mindset to read the whole series in a week.
@skullpatrol Gandhi is a very problematic individual to be given a Nobel Peace prize to. Though it has been given to plenty of problematic people anyway
uh quick question, possibly a silly one, when we say a choice of gauge is not Lorentz invariant, we mean that a Lorentz transformation would change the gauge itself, right?
To be a bit clearer, we mean given two non-Lorentz-invariant choices of gauge, $A$ and $B$, if we start in gauge $A$ and Lorentz transform and re-do calculations we would obtain results in a different gauge like $B$ for instance.
@JMac for a moment I thought stormlight archive 4 was released. And then I realised it was still October. Time has lost its meaning this year I’m afraid
I am learning DFT and the Hohenberg Kohn Theorem of Existence. It says that there is a one-to-one correspondence between the external potential and the density.
However the proofs that I have seen only show that potential gives a unique density. How do we know that a density gives a unique potent...
From what I heard since I've joined, I've understood that the purpose of stack was to make a knowledge repository but what if one day we document every single possible questions which could be asked? Would the site change policies if such a day came?
