/// compute the square of `self`
compute the square of `self`
compute the square of ` self `
pub fn sqr(&self) -> BigInt {
        BigInt {
            nat: self.nat.sqr(),
            sign: Natural,
        }
    }
pub fn sqr ( & self ) -> BigInt { BigInt { nat : self . nat . sqr ( ) , sign : Natural , } }
compute the square of `self`
compute the square of ` self `
&self