Tests if a is zero.
Tests if a is zero.
Returns a multiplied with itself n times.
Returns a multiplied with itself n times. For instance,
a pow 3 === a * a * a. Since this is a semiring, there is no notion of
a multiplicative identity, and so the exponent must be positive.
Given a sequence of as, sum them using the semigroup and return the total.
Given a sequence of as, sum them using the semigroup and return the total.
If the sequence is empty, returns None. Otherwise, returns Some(total).
Return a multiplied with itself n times.
Return a multiplied with itself n times.
Given a sequence of as, sum them using the monoid and return the total.
Given a sequence of as, sum them using the monoid and return the total.
Given a sequence of as, sum them using the semigroup and return the total.
Given a sequence of as, sum them using the semigroup and return the total.
If the sequence is empty, returns None. Otherwise, returns Some(total).
Return a added with itself n times.
Return a added with itself n times.