Reputation
3,736
Top tag
Next privilege 5,000 Rep.
Approve tag wiki edits
Badges
10 33
Newest
 Yearling
Impact
~162k people reached

Sep
29
revised Is there a function to *reverse* a number
deleted 28 characters in body
Sep
29
awarded  Popular Question
Sep
26
revised Is there a function to *reverse* a number
added 9 characters in body
Sep
26
revised Is there a function to *reverse* a number
added 21 characters in body
Sep
25
revised Is there a function to *reverse* a number
added 77 characters in body
Sep
25
answered Is there a function to *reverse* a number
Sep
25
comment Is there a function to *reverse* a number
Something like: $$r(a)=\sum_{n=0}^N 10^n \left( \left\lfloor 10^na\right\rfloor -10\left\lfloor 10^{n-1}a \right\rfloor \right).$$ Assuming this formula is correct, then you may be able to find a closed form from it... if one such exists !
Sep
25
comment Is there a function to *reverse* a number
Use the summation symbol $\Sigma$. A function can include summations.
Sep
25
comment Is there a function to *reverse* a number
Use your extractor function.
Sep
25
comment Is there a function to *reverse* a number
The number $1234$ has decimal digits $a=(1,2,3,4)$, with value $\sum_{k=0}^3 10^{3-k}a_k$, so the reverse is $\sum_{k=0}^3 10^k a_k$. Not exactly what you're looking for, but you can build a function using this and the number extractor function.
Sep
24
reviewed Approve Find complex numbers in polynomial
Sep
24
reviewed Approve Number Theoretic Transform (NTT) example not working out
Sep
22
accepted Number Theoretic Transform (NTT) example not working out
Sep
17
comment How to find the maximum curvature of $y=e^x$?
No reason whatsoever for this particular question, but as I mentioned for future questions this technique may be useful/required. I like your answer also.
Sep
17
comment Is is possible to re-arrange this equation?
... with the condition that $1+p+n\neq 0$, although being percentages this will never happen...
Sep
17
revised Number Theoretic Transform (NTT) example not working out
added 5 characters in body
Sep
17
revised Number Theoretic Transform (NTT) example not working out
added 56 characters in body
Sep
17
revised Number Theoretic Transform (NTT) example not working out
added 73 characters in body
Sep
17
comment How to find the maximum curvature of $y=e^x$?
This may not be true for other functions.
Sep
17
answered Number Theoretic Transform (NTT) example not working out