Re: newbie: how to define, typeset a multi-rule function?

*To*: mathgroup at smc.vnet.net*Subject*: [mg96790] Re: newbie: how to define, typeset a multi-rule function?*From*: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>*Date*: Wed, 25 Feb 2009 04:02:06 -0500 (EST)*Organization*: Uni Leipzig*References*: <go0j63$n28$1@smc.vnet.net>*Reply-to*: kuska at informatik.uni-leipzig.de

Hi, Piecewise[] ?? Regards Jens Tom Roche wrote: > As advertised by the Subject:, I'm new to Mathematica (specifically > 7.0.0 for Students for 32-bit Windows on XP Pro) so please excuse any > lapses in terminology. I'd also appreciate pointers to specific docs > rather than just an RTFM. I suspect in this case I just need to know > what the appropriate term is for what I'm trying to create. However > I've tried searching the docs for various permutations of multi-rule > or multi-line function, and even googling, to no avail. > > I'm trying to create a notebook that typesets a particular > mathematical function, and then solves it. The function has 2 parts or > rules: it returns k (a constant) for one part of its domain, and 0 > otherwise. This is typically typeset with the function name and the > equals sign on one line, then a large left curly bracket (or brace) > centered on that line, then each rule on a separate line with all the > rule lines to the right of the bracket. For an example in a math > layout, I can almost typeset the function in OpenOffice Math like > > f_x(%chi) = left lbrace stack {k if %chi in [0,1] # 0 otherwise} right > rbrace > > (except that I don't want the closing brace, but that's another > problem). I tried to create this using the palettes, but I didn't see > one that did multiline brackets. What do I need to use? > > Once I've typeset this function, I want to actually solve it. How does > one create a function with multiple rules in Mathematica? > > TIA, Tom Roche <Tom_Roche at pobox.com> >