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| bio | website | |
|---|---|---|
| location | Madrid, Spain | |
| age | 49 | |
| visits | member for | 2 years, 6 months |
| seen | 1 hour ago | |
| stats | profile views | 146 |
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Oct 12 |
answered | Algorithm for keeping a concrete version of Euclid's argument simple |
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Sep 26 |
comment |
How many ways can I make six moves on a Rubik's cube? @Henry: You are right. actually the number I gave allows 18 legal moves while the OP ask for 12 (90 deg twists) so the number of different positions after at most 6 moves is a lot smaller: 1056772. Actually the method given by him (make six random moves until the puzzle is solved) fails for the 96696 positions after 5 moves if it does not take this into account. |
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Sep 24 |
comment |
The number of ones in a binary representation of an integer @Matt: Why 16x increase? I'm not sure I agree, as you are substituing a few cheap operations with table lookup which needs slow memory access and messes the cache. |
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Sep 24 |
answered | The number of ones in a binary representation of an integer |
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Sep 12 |
comment |
Bound for divisor function $\mathrm{Li} x$ is the logarithmic integral $=\int_2^x \frac{ dt}{\log t}$ see here. |
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Sep 12 |
answered | Bound for divisor function |
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Jun 21 |
answered | Calculating monodromy |
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Jun 20 |
revised |
Finding the integer $\le n$ with largest number of divisors added 11 characters in body |
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Jun 19 |
awarded | Student |
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Jun 19 |
asked | Finding the integer $\le n$ with largest number of divisors |
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May 5 |
comment |
Example of a rational function such that : $(f(x))^{3} + (g(x))^{3} + (h(x))^{3}=x$ @lhf: In the page linked by Gerry you have several solutions and links as: $(m^3-3^6n^9)^3 + (-m^3+3^5mn^6+3^6n^9)^3 + (3^3m^2n^3+3^5mn^6)^3$ $= m(3^2m^2n^2 +3^4mn^5+3^6n^8)^3$. |
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Mar 19 |
answered | Common terms in general Fibonacci sequences |
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Mar 13 |
revised |
The number of symmetric polynomials of n degree Error Corrected |
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Mar 13 |
revised |
The number of symmetric polynomials of n degree added 828 characters in body |
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Mar 13 |
awarded | Commentator |
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Mar 13 |
comment |
The number of symmetric polynomials of n degree I don't understand what you mean by invariant, do you mean homogenous?, all the terms have the same total degree? take this four examples with $n=3$ and $k=2$, a) $x^3+y^3$, b) $x^2y + xy^2$, c) $x^3+y^3 + x + y$ d) $x^2y + xy^2+x+y$, which are you counting as degree 3? |
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Mar 13 |
answered | The number of symmetric polynomials of n degree |
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Mar 11 |
comment |
Find maximum divisors of a number in range PARI-GP is a great program to perform number theoretic calculations. The algorithm I've used is the same I have described, but PARI-GP knows how to handle big numbers and that makes everything easier. |
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Mar 11 |
revised |
Find maximum divisors of a number in range added 317 characters in body; added 2 characters in body |
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Mar 11 |
answered | Find maximum divisors of a number in range |
