Comments (3)
There is a difference between the indexing in algebraic topology and the one here however. In algebraic topology one might start with 1
as the first natural number, although this seems to be less common than it used to be. Since our natural numbers start with 0, it would be annoying having to special case f^(0)
. Therefore shifting the indexing by one, let's you have a "cleaner" indexing.
from book.
Yeah, I'm inclined to stick with the current convention for that reason. It's not even that the f^n : X^n -> X^(n-1)
convention chooses to start with 1 rather than 0, but it's inconsistent about where it starts: the X's start from 0, but the f's start from 1.
from book.
Thank you with your responses and I can see the rationale better now. I'll close the issue since nothing needs to be done.
from book.
Related Issues (20)
- Assumption that `A // R` is a set HOT 4
- Rules for universes in Appendix A.2 are incomplete HOT 3
- identity type usage HOT 19
- Augment assumptions for Thm 5.4.4, 5.4.5, and 5.4.7 HOT 19
- Typos in proof of Lemma 10.3.12 HOT 5
- Use parentheses in the proof of Lemma 2.1.4(iii) HOT 3
- Cumulativity of the universe hierarchy HOT 4
- CI problem: "dubious ownership" HOT 1
- Provided Hashes in errata.pdf Not Found HOT 2
- Errata PDF unreadable
- Corollary 8.8.5 HOT 4
- Lemma 8.5.9 is missing a label
- Nightly builds pdfs are dead links HOT 8
- Exercise 7.3 could be made stronger
- proof-theoretic consistency in the introduction HOT 6
- cardinal numbers in the introduction HOT 5
- real numbers in the introduction HOT 7
- Switch to using truncated logic as default in the book HOT 2
- max and sup HOT 9
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from book.