WBesi WBesj WBesk WBesy WCbrt WCelli1 WCelli2 WCelli3 WDconst WDigamma WE_1 WEi WExpm1 WFma WHypot WLi WLog1p WTrigamma

WCelli1() Function WCelli1 ( K As  Double ) Complete elliptic integral of the first kind K(k) Purpose WCelli1 computes the Legendre form of complete elliptic integral of the first kind K(k). K(k) = F(π/2, k) where F(φ, k) is the incomplete elliptic integral of the first kind defined as follows: F(φ, k) = ∫ 1/sqrt(1 - k^2(sin(t))^2) dt [0, φ] Returns Complete elliptic integral of the first kind K(k). Parameters [in] K Argument k. (-1 < K < 1) Reference boost/math/special_functions