inv

inv(i,m)

:: the inverse (reciprocal) of i modulo m.

return

integer

i m

integer

• This function computes an integer such that ia == 1 mod (m).
• The integer i and m must be mutually prime. However, inv() does not check it.

[71] igcd(1234,4321);  
1
[72] inv(1234,4321);
3239
[73] irem(3239*1234,4321);
1

References

section igcd,igcdcntl.

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