How do you pronounce the expression $(i|i)$?

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I'm writing a library for translating latex into readable speech, and usually I rely on Larry's speakeasy to let me know how to read an equation.

Seeing as I could not find an answer for the following expression:

$$ k_{ii}\det \mathbf{K}(i|i) $$

Namely, the (i|i) part, I need to find the best way to pronounce it. Otherwie I will be pronouncing it roughly as:

Boldface Kay. Left Parentheses. Eye. Pipe. Eye. Right Parentheses.

If there is more than one context which would change its pronounciation, please provide it.