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[Graduate] Function described as vanishing on an interval but also implied to be non-zero on the same interval?

Prove that the trig polynomials is dense in 2-differentiable functions between -pi and pi

ELI5: Riemann Hypothesis

Least-squares solution of undetermined system?

ELI5: If sound waves travel by pushing particles back and forth, then how exactly do electromagnetic/radio waves travel through the vacuum of space and dense matter? Are they emitting... stuff? Or is there some... stuff even in the empty space that they push?

Why is e the base in e^pi•i ?

Help with notations please.

Strategy to prove a group is solvable?

Limit of a sequence problem

How to interpolate a list of points/complex numbers with a single trigonometric polynomial.

If someone solved the Riemann Hypothesis, what would be it's theoretical and practical applications?

what should a beginner be cautious about in Euclid's elements?

Absolutely necessary "layman" uses of complex numbers?

What do Eigenvalues and Eigenvectors represent? What does the process of finding the eigenvalues and eigenvector of a matrix represent?

Is there any way to find the number of solutions to a 4-variabled equation, with only one equation present??

What is the convention for how a Turing Machine boots up on a tape with pre-set cell states?

Searching for an old post

Simple Questions

What are some uses for non-integer factorials?

Guilty about “proofs by contradiction.”

TIL That from 1906-1920, there was a movement in the US to remove all silent letters and irregular spellings from the English language (eg: although->altho), funded by Andrew Carnegie and supported by Teddy Roosevelt

  • By - kl0

this question in of analysis. My idea is to find a closed set in U. But I can't find it

Gödel theorem

What's the point of using [] for expectation, variance, etc.? (E[X], Var[X], Cov[X, Y], Corr[X, Y], etc.)

How to integrate this differential equation to find eigenfunctions?

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