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#### 20.2.2.8 Exportiere als TeX

The `itensor` package provides limited support for exporting tensor expressions to TeX. Since `itensor` expressions appear as function calls, the regular Maxima `tex` command will not produce the expected output. You can try instead the `tentex` command, which attempts to translate tensor expressions into appropriately indexed TeX objects.

Function: tentex (expr)

  To use the `tentex` function, you must first load `tentex`, as in the following example:

      (%i1) load(itensor)$
      (%i2) load(tentex)$
      (%i3) idummyx:m;
      (%o3)                                  m
      (%i4) ishow(icurvature([j,k,l],[i]))$

                  m1       i           m1       i           i
      (%t4)  ichr2    ichr2     - ichr2    ichr2     - ichr2
                  j k      m1 l        j l      m1 k        j l,k

                                                            i
                                                     + ichr2
                                                            j k,l

      (%i5) tentex(%)$
      $$\Gamma_{j\,k}^{m_1}\,\Gamma_{l\,m_1}^{i}-\Gamma_{j\,l}^{m_1}\,
       \Gamma_{k\,m_1}^{i}-\Gamma_{j\,l,k}^{i}+\Gamma_{j\,k,l}^{i}$$

  Note the use of the `idummyx` assignment, to avoid the appearance of the percent sign in the TeX expression, which may lead to compile errors.

  NB: This version of the `tentex` function is somewhat experimental.

Next: Schnittstelle zum Paket ctensor, Previous: Graßmann-Algebra, Up: Funktionen und Variablen für itensor [Contents][Index]