The thing is assumptions is supposed to give result for queries like : newask(Q.positive(2*x + y),Q.positive(x) & Q.positive(y))
So , in this case, we have to assume that x and y are positive and qyery for 2*x+y using the fact that addition of two positive numbers gives a positive number . By forward chaining I meant this process of reasoning . @Richard Could you please elaborate how theorem proving or geometric reasoning might work in this case ? All we are using is the simple closure properties of multiplication. -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To post to this group, send email to sympy@googlegroups.com. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/96334ebe-efdc-4543-909f-341753e515b9%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
