Left modules notation with a left subscript?

[Math Amateur]

I am reading Berrick and Keating's book on rings and modules.

Berrick and Keating indicate a right module over a ring $$R$$ as $$M_R$$, but in a left module the subscript is to the left ... can someone help me with the Latex script to achieve this?

An example of "left-subscript" notation appears in the following text from Berrick and Keating's book, where they refer to End($$M$$) where $$M$$ is a left module over $$E$$.View attachment 3074
Hope someone can help?

Peter

 

[Euge]

I am reading Berrick and Keating's book on rings and modules.

Berrick and Keating indicate a right module over a ring $$R$$ as $$M_R$$, but in a left module the subscript is to the left ... can someone help me with the Latex script to achieve this?

An example of "left-subscript" notation appears in the following text from Berrick and Keating's book, where they refer to End($$M$$) where $$M$$ is a left module over $$E$$.View attachment 3074
Hope someone can help?

Peter

Sure Peter, use {}_EM to produce ${}_EM$.