It's the first time that i write i this forum so i hope i've choose the right topic.
I'm writing my math-thesis using latex.
I've to create a triangolar diagram to show the composition law of three functions.
So i use this code:
but the program produces an error when i insert the code to label the arrow:
The error is the seguent:
here i have my preamble:
Can someone tell help me to find the error?
I've copied only the diagram text with the label code
\epsilonin a new file and it works???? Are there some packages that create the error?
I've found that setting the language to english instead of italian all works. When i change language, i use italian, there is the extra babel package. i think the problem is this but i cannot say why.