substitutions in noncommutative products

• Subject: substitutions in noncommutative products
• From: Barton Willis
• Date: Mon, 8 Oct 2012 11:30:36 +0000

I think there is no general scheme for substitutions into a noncommutative product. And I'm not
sure that tellsimp works all that well for such substitutions.

  (%i6) e : a.b.c$

  (%i7) subst(1, b. c, e);
  (%o7) a . b . c

  (%i8) subst(1, b.c, e), dotassoc : false;
  (%o8) a

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