sumsqint
Example:
sumsqint(1) % returns [0,1]
sumsqint(65) % returns [1,8;4,7]
sumsqint can work with large numbers if they are factored, e.g. solve x^2+y^2=(25e6)^2:
sumsqint(repmat(factor(25e6),1,2)) % returns 9x2 array
sumsqint works with variable precision integers if you have John D'Errico's Variable Precision Integer toolbox (20 July 2009 update) - see links below.
sumsqint(vpi(5)^100) % returns 51x2 vpi array
sumsqint(vpi(65)^100) % returns 5101x2 vpi array
The algorithm uses Gaussian integer factorization. See the help for more details.
Citation pour cette source
Ben Petschel (2024). sumsqint (https://www.mathworks.com/matlabcentral/fileexchange/24798-sumsqint), MATLAB Central File Exchange. Récupéré le .
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Inspiré par : Variable Precision Integer Arithmetic
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Version | Publié le | Notes de version | |
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1.1.0.0 | added support for factored inputs; fixed a bug in the handling of vpi numbers with prime factors larger than 100; added option to remember newly found gaussian prime factors. |
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1.0.0.0 |