Is it “the xᵢ’s” or “the xᵢ”?
Solution 1:
Interesting question. The notation xᵢ refers to all the x's, so it should be taken as plural. I think if you find a math book, you'll find things like "... the xᵢ are all positive".
Interesting question. The notation xᵢ refers to all the x's, so it should be taken as plural. I think if you find a math book, you'll find things like "... the xᵢ are all positive".