Comment Comment by sheetjs Nice library! For some strange reason, Excel, Mathematica, and bessel on npm (http://npm.im/bessel) disagree with Jmat.js for the bessel family: SetPrecision[BesselY[10,10],20] -0.35981415218340272205 require('bessel').bessely(10,10) -0.35981415215916784 =BESSELY(10,10) -0.35981415215916800 Jmat.bessely(10,10) -0.3598156646154304 parent sheetjs 12 years ago