## reduce-algebra-developers — Discussion of development, administration and support for Reduce

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 [Reduce-algebra-developers] reduce at Mac OSX From: Zhongbo Kang - 2011-10-27 14:25:09 ```Dear all, I am not sure if any of you encounter the following problem: I have installed REDUCE at my Mac (build from the source). However, every time when I update my Mac OSX system (automatically by Mac Software update), then my reduce will NOT work any more. When I run reduce, it will return the error message telling that there is no build version of reduce. So I have to rebuild every time when I update Mac OSX, it gets really annoying. Any ideas? Best, Kang ```
 [Reduce-algebra-developers] Number of nested substitutions From: Raffaele Vitolo - 2011-10-27 14:02:33 ```Dear All, I should solve a system of equations where a set of variables are substituted by expressions which, in turn, can contain variables from the same set to be substituted. This does not lead me to 'circular' substitutions or to new conditions because of some theoretical principles under which the system is built. Substitutions are implemented as a sequence of `let a=b' rules. However, it seems to me that the number of these substitutions slows down the computation too much. So, my question is if there exists a way (like an internal parameter) to measure the number of nested substitutions and/or a faster way to do substitutions than `let' rules, such as a way to get rid of nested substitutions before using substitutions in computations. Best regards, Raffaele. -- Raffaele Vitolo, Dipartimento di Matematica 'E. De Giorgi' Universita' del Salento, via per Arnesano 73100 Lecce ITALY tel.: +39 0832 297425 (office) fax.: +39 0832 297594 home page: http://poincare.unisalento.it/vitolo ```

Showing 2 results of 2