List questions from sums-of-squares

Published on 29 Jan 2017 - 10:39

70

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A method to study the factorization of very big numbers

Published on 29 Jan 2017 - 12:48

404

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A simple algorithm for representing a square of the form $4k+1$ as a sum of 3 squares

Published on 30 Jan 2017 - 16:13

109

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Find the value of $\frac {1} {1^2 + 1} +\frac {1} {2^2 + 2} +\frac {1} {3^2 + 3} +\frac {1} {4^2 + 4} ++ \dots + \frac {1} {2008^2 + 2008} $

Published on 27 Mar 2026 - 14:52

4.3k

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Find the value of: $\frac{\sqrt{45} + \sqrt{18}} {\sqrt{7+2\sqrt{10}}}$

Published on 04 Feb 2017 - 3:59

776

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Two times the sum of two squares is a sum of two squares

Published on 27 Mar 2026 - 22:15

125

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Remainder of $\sum_{x=1}^{312} x \times x!$ divided by 2016

Published on 05 Feb 2017 - 11:12

173

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Prove or disprove a claim involving Pythagorean primes

Published on 27 Mar 2026 - 13:19

417

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How can I prove the sum of squares and the sum of cubes with binomial coefficients?

Published on 06 Feb 2017 - 6:47

198

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Could be this : $7131372917538397234773191167617941438959$ written as $x^{2}+y^{2}$ with $x, y$ integers?

Published on 26 Mar 2026 - 17:33

87

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Express Integer as the sum of $k$ squares

Published on 10 Feb 2017 - 23:40

877

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The prime power decomposition of sum of two squares

Published on 11 Feb 2017 - 11:24

2.9k

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Every number is the sum of three squares with signs

Published on 15 Feb 2017 - 9:16

45

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Composition formula for $ax^2 \pm by^2$

Published on 21 Feb 2017 - 11:13

41

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Can someone show me a simple example of finding simple squared error in k-means?

Published on 25 Mar 2026 - 21:49

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Is $7m^2-3n^2$ a perfect square?

A method to study the factorization of very big numbers

A simple algorithm for representing a square of the form $4k+1$ as a sum of 3 squares

Find the value of $\frac {1} {1^2 + 1} +\frac {1} {2^2 + 2} +\frac {1} {3^2 + 3} +\frac {1} {4^2 + 4} ++ \dots + \frac {1} {2008^2 + 2008} $

Find the value of: $\frac{\sqrt{45} + \sqrt{18}} {\sqrt{7+2\sqrt{10}}}$

Two times the sum of two squares is a sum of two squares

Remainder of $\sum_{x=1}^{312} x \times x!$ divided by 2016

Prove or disprove a claim involving Pythagorean primes

How can I prove the sum of squares and the sum of cubes with binomial coefficients?

Could be this : $7131372917538397234773191167617941438959$ written as $x^{2}+y^{2}$ with $x, y$ integers?

Express Integer as the sum of $k$ squares

The prime power decomposition of sum of two squares

Every number is the sum of three squares with signs

Composition formula for $ax^2 \pm by^2$

Can someone show me a simple example of finding simple squared error in k-means?

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