0
votes
4answers
114 views

RSolve fails on a two-equation non-linear system

I have a system of just two recurrence equations, I need to solve them and so I use RSolve: ...
0
votes
3answers
178 views

Given a Boolean representation of a system, how can the Reliability Function be displayed as symbolic algebra?

Can Mathematica 9 convert a Boolean representation of an RBD to its symbolic algebraic form? If I have a simple series Reliability Block Diagram made up of 2 components, c1 and c2 bexpr1=And[c1,c2] ...
3
votes
1answer
147 views

Cannot solve system of linear equation sums?

I cannot get mathematica to solve: The problematic code: ...
11
votes
1answer
208 views

FindInstance returns Indeterminate in version 9, but not in 8

Here is a trivial system of equations in three unknowns for which FindInstance obtains a solution: ...
16
votes
1answer
620 views

Bug in Solve (Mathematica 9)

Just came across the strangest bug under both Mathematica 9.0.0 and 9.0.1. If one enters: Solve[m == p Sin[x] && -Pi/2 < x < Pi/2, x] ... then ...
3
votes
1answer
1k views

NSolve: Mathematica 9 issue

In Mathematica 8 the following expression evaluates and returns a result in terms of InverseFunction: ...
4
votes
1answer
253 views

Using external variable as a variable inside WhenEvent & NDSolve

I'm trying to use the new WhenEvent functionality of NDSolve in Mathematica 9, in order to perform an action when a variable in the system reaches a certain value. I would like this variable to come ...