#### Mathematical English Usage - a Dictionary

##### by Jerzy Trzeciak

## i.e.

[= that is; *see also*: namely

These are precisely the linear functionals which also preserve
multiplication, i.e., f(ab)=f(a)f(b). [The comma after * i.e.* is optional.]

[Note the difference between * namely* and * that is*: while * namely* introduces specific or extra information, * that is* (or * i.e.*) introduces another way of putting what has already been said.]

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