modified first kind (I) handle negative argument

2024-09-19 13:27:21 -04:00 · 2024-09-19 13:27:21 -04:00 · 9f2a11ec29
commit 9f2a11ec29
parent 2e23313298
1 changed files with 1 additions and 0 deletions
--- a/bits/70_besseli.js
+++ b/bits/70_besseli.js
@ -17,6 +17,7 @@ var besseli/*:BesselF*/ = (function() {

  return function besseli(x/*:number*/, n/*:number*/)/*:number*/ {
    n = Math.round(n);
+    if(x < 0) return ((n%2)?-1:1)*besseli(-x, n);
    if(n === 0) return bessel0(x);
    if(n === 1) return bessel1(x);
    if(n < 0) return NaN;