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leftaroundabout
  • Member for 11 years, 1 month
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81 votes
Accepted

Looking for a function that approximates a parabola

29 votes
Accepted

Are angles ever multiplied?

21 votes

Why is a linear transformation called linear?

20 votes

Why are some non elementary integrals defined and others are not?

18 votes

In classical geometry why is a line considered to be parallel to itself?

18 votes

why don't we define vector multiplication component-wise?

15 votes
Accepted

Construct a continuous real valued function which takes zero on integers and such that image of function is not closed.

14 votes
Accepted

Is Sigma $\Sigma$ a mathematical way of doing a for loop?

12 votes

What is a good way to explain why the graph of polynomials do not exhibit ripples, even in an arbitrarily small interval?

9 votes

What is the mathematical notation for rounding a given number to the nearest integer?

9 votes

Two Dirac delta functions in an integral?

8 votes

Trigonometric functions -- sin - cos - tan - Differences, actual applications,

7 votes
Accepted

The misuse of Dirac's $\delta$

7 votes

Is there a mathematical symbol for "For every element"?

6 votes

Why does the derivative of sine only work for radians?

6 votes

Equation of a "tilted" sine

6 votes

What does the symbol nabla indicate?

6 votes

How do basis functions work?

6 votes

what is sine of a real number

5 votes

Why do we use von Neumann ordinals and not Zermelo ordinals?

5 votes
Accepted

FFT bins from exact frequencies

4 votes

How is the Fourier transform "linear"?

4 votes
Accepted

Covariant Power Set Functor being injective on arrows.

4 votes

Monoids in Category Theory

4 votes

Derivative/integral relationship appears to disprove the fundamental theorem of calculus!!!

4 votes

Is a negative number squared negative?

4 votes

How can a gradient be thought of as a function?

4 votes

How to calculate the sine manually, without any rules, calculator or anything else?

4 votes

How unique is $e$?

4 votes

Curiosity: Wouldn't the definition of the derivative always be 1 if it exists?