#### D.9.2.11 texring

Procedure from library `latex.lib` (see latex_lib).

Usage:
  texring(fname, r[,L]); fname string, r ring, L list

Return:
  if `fname=""`: string, the ring in TeX-typesetting;
  otherwise: append this string to the file `<fname>` and return nothing.

Note:
  preceding ">>" are deleted and suffix ".tex" (if not given) is added to `fname`.
  The optional list L is assumed to be a list of strings which control, for instance the symbol for the field of coefficients.
  For more details call `texdemo();` (generates a LaTeX2e file called `texlibdemo.tex` which explains all features of `texring`).

Example:

    LIB "latex.lib";
    ring r0 = 0,(x,y),dp;                // char = 0, polynomial ordering
    texring("",r0);
    ==> $\Q[x,y]$
    //
    ring r7 =7,(x(0..2)),ds;             // char = 7, local ordering
    texring("",r7);
    ==> $\Z_{7}[[x_{0},x_{1},x_{2}]]$
    //
    ring r1 = 0,(x1,x2,y1,y2),wp(1,2,3,4);
    texring("",r1);
    ==> $\Q[x_{1},x_{2},y_{1},y_{2}]$
    //
    ring rr = real,(x),dp;               // real numbers
    texring("",rr);
    ==> $\R[x]$
    //
    ring rC = complex,x,dp;              // complex coefficients
    texring("",rC);
    ==> $\C[x]$
    //
    ring rabc =(0,t1,t2,t3),(x,y),dp;    // ring with parameters
    texring("",rabc);
    ==> $\Q(t_{1},t_{2},t_{3})[x,y]$
    //
    ring ralg = (7,a),(x1,x2),ds;        // algebraic extension
    minpoly = a2-a+3;
    texring("",ralg);
    ==> $\Z_{7}(a)[[x_{1},x_{2}]]$
    texring("",ralg,"mipo");
    ==> $\Z_{7}(a)/(a^{2}-a+3)[[x_{1},x_{2}]]$
    //
    ring r49=(49,a),x,dp;                // Galois field
    texring("",r49);
    ==> $\F_{49}[x]$
    //
    setring r0;                          // quotient ring
    ideal i = x2-y3;
    qring q = std(i);
    texring("",q);
    ==> $\Q[x,y]/\left(y^{3}-x^{2}\right)$
    //
    // ------------------ additional features -------------------
    ring r9 =0,(x(0..9)),ds;
    texring("",r9,1);
    ==> $\Q[[x_{0},\ldots,x_{9}]]$
    texring("",r9,"C","{","^G");
    ==> $\C\{x_{0},x_{1},x_{2},x_{3},x_{4},x_{5},x_{6},x_{7},x_{8},x_{9}\}^G$
    //
    ring rxy = 0,(x(1..5),y(1..6)),ds;
    intvec v = 5,6;
    texring("",rxy,v);
    ==> $\Q[[x_{1},\ldots,x_{5},y_{1},\ldots,y_{6}]]$

User manual for Singular version 4-0-3, 2016, generated by texi2html.