I am new to Mathematica and am particularly struggling with its differential equation solving capacity. Most recently, I have encountered a completely baffling issue where even the example code straight from the included documentation does not behave the same way when I evaluate it in a notebook. At right in the reference documentation for DSolve; at left is what happens when I paste exactly those same equations into a fresh notebook. Notably, one of them even throws an error! I am completely at a loss for what is going on here. Has anyone else encountered this issue?
If you do something like:
x=1
That means "whenever you see x, replace it with 1". You thus cannot subsequently use x as a free variable in your session.
x
1
Could you post a notebook where your problem occurrs?
Hans,
I am new to DSolve, and I had a similar problem too. Clear[x,y] followed by the DSolve worked. I cannot explain why I had to give Clear[x,y] command. May be someone will explain.
Vijay
You could try to quit the kernel : Evaluation -> Quit Kernel.
That leaves your notebook intact, but seems to forget everything that had happended before ( the definitions you might have to use as well).
