I almost always use the following environments:
eqnarray and environments that are defined in the preamble with the command
proposition etc ...) for my dissertation.
But I would like to customize these environments as follows:
having a unified numbering all these environments of the type X.Y.Z where x = "chapter number" y = "section number" z = "number of the subsection"
numbering stay to the left of the right environment and not the name I mentioned these environments. Exemple:
**"X.Y.Z Theorem " xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
(X.Y.(Z+1)) equation = equation
X.Y.(Z+2) Definition XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX**
do not lose the automatic spacing before or after the environments defined by the command
Did not lose the italic font environments defined by the command
What did not come in with the environment comflito
That I could set the font in the preamble to these environments.