pentagonal.cpp File Reference

#include "pentagonal.hpp"
#include "../helper/helper.hpp"
#include "divisors.hpp"
#include "primes.hpp"

Include dependency graph for pentagonal.cpp:

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Namespaces
	sigmaodd
	A lot of functions and stuffs to deal the sigma_odd problem and related stuffs.

Functions
std::vector< nat_type >	sigmaodd::sum_divisors__euler__table_ (sum_divisors__euler__table_nb_)
nat_type	sigmaodd::sum_divisors_diff_ (nat_type n, nat_type pi)
nat_type	sigmaodd::sum_divisors__euler (nat_type n)
	Calculates the sum of all divisors of n with the Euler formula about pentagonal numbers and returns it. More...
bool	sigmaodd::sum_divisors__euler_cache_is_full ()
	Return true iff the cache used by sum_divisors__euler() is full. The function can clean space, but it is less efficient. More...
std::size_t	sigmaodd::sum_divisors__euler_cache_nb ()
	Return the current number of items in the cache used by sum_divisors__euler() More...
std::size_t	sigmaodd::sum_divisors__euler_table_nb ()
	Return the (constant) number of items in the table used by sum_divisors__euler() More...

Variables
size_t	sigmaodd::sum_divisors__euler__cache_max_nb_ = 20000
size_t	sigmaodd::sum_divisors__euler__table_nb_ = 1024*64
std::map< nat_type, nat_type >	sigmaodd::sum_divisors__euler__cache_

Detailed Description

(December 20, 2017)

GPLv3 — Copyright (C) 2017 Olivier Pirson http://www.opimedia.be/

Definition in file pentagonal.cpp.