Re: How to express continued sum?

*To*: mathgroup at smc.vnet.net*Subject*: [mg73449] Re: How to express continued sum?*From*: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>*Date*: Fri, 16 Feb 2007 05:23:21 -0500 (EST)*Organization*: The Open University, Milton Keynes, UK*References*: <er3hbm$f9e$1@smc.vnet.net>

oicqgogogo at sina.com wrote: > I want to know how to get the continued sum expression by mathematica? > Such > as: > sigma(x=0..20)sigma(y=0..20)sigma(z=0..20)f(x,y,z) > > Thanks! > > In Mathematica syntax this is Sum[f[x, y, z], {x, 0, 20}, {y, 0, 20}, {z, 0, 20}] See http://documents.wolfram.com/mathematica/functions/Sum Regards, Jean-Marc