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Nov
9
revised How stable is my quaternion interpolation?
added 6 characters in body
Nov
8
asked How stable is my quaternion interpolation?
Nov
6
comment How can I determine that a relation lacks a property without using a counterexample?
you can try to find a contradiction with the assumption that the property holds for all, this proof by contradiction will also allow you to construct a counterexample
Oct
31
answered Exponential equation in x,y,z
Oct
26
comment What is the simplest proof of the pythagorean theorem you know?
@KeshavSrinivasan moreover it's easy to create a contraption like that in real life that proves $a^2+b^2$ is greater or less than $c^2$ by adjusting the depth
Oct
11
awarded  Yearling
Oct
3
comment Riddle: 1 question to know if the number is 1, 2 or 3
@Oleg567 what would you reply be if I gave you the command to say "no" if your number is 1, "don't know" if your number is 2, or "yes" if your number is 3?
Aug
29
comment Find the trace of the matrix?
the diagonal matrix with distinct numbers on the diagonal fits the description
Aug
27
answered Would the answer of the square root of a square root be positive or negative?
Aug
14
comment Notations that are mnemonic outside of English
@detly but much less funny
Aug
14
awarded  Nice Answer
Aug
13
answered Notations that are mnemonic outside of English
Aug
13
comment Notations that are mnemonic outside of English
the Dutch "sokkel" means pedestal
Aug
5
comment Why must a function have to have even and odd parts
only caveat is that $f(x)$ and $f(-x)$ must be defined
May
30
comment Last digits of a power of 2
converting to binary or ternary will be a step backwards, it's a question about it's decimal representation
May
28
comment How prove this $\frac{\sqrt{2}}{2}-\frac{1}{15}<F\left(\frac{\pi}{2}\right)<\frac{\sqrt{2}}{2}$
I can reduce $F(\pi/2)$ to $\sum_{n=1}^{\infty}\dfrac{(-1)^n}{\sqrt{8n^3+2n}}$
May
24
comment Can we get just $3$ from $\pi$?
@kaz probably not..
May
9
comment How do you calculate the modulo of a really high number with a large power, with a really high mod number?
note that this work best is the modulo number is the composite of many small primes, if it is prime itself this won't work
May
8
awarded  Caucus
Apr
25
comment What would base $1$ be?
@gangqinlaohu unless you specify that 1 is represented by 2 tallies