I suggest removal of modulus-theorem tag. In fact, it seems that this was already suggested in the tag-excerpt and the tag-wiki - probably the user who made the edit did not know that such suggestions can (or even should) be posted on meta.¹

It seems that the tag has been created for questions related to maximum modulus principle from complex analysis. But already since its inception the tag attracted mostly questions related to modular arithmetics.

I think that a tag with this name is very likely to lead to confusion and incorrect tagging even if the tag wiki explicitly specifies where it should be used. If a tag for maximum modulus principle is needed, then a tag with more descriptive name should be created. (Something like maximum-modulus-principle or maximum-modulus-theorem.)

¹The tag-wiki currently reads: "This tag (modulus-theorem) attracts wrong questions. It should be closed and absorbed in the tag (modular-arithmetic). It is so rare that it is difficult to score the 5 points necessary to make a direct suggestion." The tag-excerpts says simply: "This tag is a poor synonym for (modular-arithmetic)."

Resolved. All instances of this tag have been manually removed. (Thanks go to Jyrki Lahtonen.)

I suggest removal of modulus-theorem tag. In fact, it seems that this was already suggested in the tag-excerpt and the tag-wiki - probably the user who made the edit did not know that such suggestions can (or even should) be posted on meta.¹

It seems that the tag has been created for questions related to maximum modulus principle from complex analysis. But already since its inception the tag attracted mostly questions related to modular arithmetics.

I think that a tag with this name is very likely to lead to confusion and incorrect tagging even if the tag wiki explicitly specifies where it should be used. If a tag for maximum modulus principle is needed, then a tag with more descriptive name should be created. (Something like maximum-modulus-principle or maximum-modulus-theorem.)

¹The tag-wiki currently reads: "This tag (modulus-theorem) attracts wrong questions. It should be closed and absorbed in the tag (modular-arithmetic). It is so rare that it is difficult to score the 5 points necessary to make a direct suggestion." The tag-excerpts says simply: "This tag is a poor synonym for (modular-arithmetic)."