>>635
だから、下記の記法が標準だろ？ｗｗｗ
（ 不等号 ＜ で、具体的な すぐ右がどうの、左がどうの は、不要！ｗ ）
いろんな流儀が存在する場合もありだが、自分の幼稚な流儀をごり押ししなさんなｗ

（>>594より）
https://en.wikipedia.org/wiki/Ordinal_arithmetic
Ordinal arithmetic

Addition
The first transfinite ordinal is ω, the set of all natural numbers. For example, the ordinal ω + ω is obtained by two copies of the natural numbers ordered in the usual fashion and the second copy completely to the right of the first. Writing 0' < 1' < 2' < ... for the second copy, ω + ω looks like
0 < 1 < 2 < 3 < ... < 0' < 1' < 2' < ...
This is different from ω because in ω only 0 does not have a direct predecessor while in ω + ω the two elements 0 and 0' do not have direct predecessors.

Multiplication
Here is ω・2:
00 < 10 < 20 < 30 < ... < 01 < 11 < 21 < 31 < ...,
which has the same order type as ω + ω.

Exponentiation
For instance, ω^2 = ω・ω using the operation of ordinal multiplication. Note that ω・ω can be defined using the set of functions from 2 = {0,1} to ω = {0,1,2,...}, ordered lexicographically with the least significant position first:
(0,0) < (1,0) < (2,0) < (3,0) < ... < (0,1) < (1,1) < (2,1) < (3,1) < ... < (0,2) < (1,2) < (2,2) < ...
Here for brevity, we have replaced the function {(0,k), (1,m)} by the ordered pair (k, m).
(引用終り)