I'd like to know if it is possible switch between the
reqno options in the same document keeping the numbering of the equations. Namely i use the
reqno option (default for
amsmath and the standard
article class), but i want that some equations are numbered by the left side (as if I had relied the
leqno option) and the others no.
I'd like a commands as
\reqnomode to change the position of
\tag in anywhere of the document.
Is this possible?