M contains all ordinals
105146
$M$ contains all ordinals
146347
An imo shortlist algebra question
108957
Cardinality of a totally ordered union
91938
Countable Matrix Representation
40937
Is the set of partial order relations over $ \mathbb{N}$ countable?
152516
How do we justify functions on the Ordinals
109959
Calculate mean of ordinal variable
131163
There is a well ordering of the class of all finite sequences of ordinals
2935
Completness and Set of Result of One Set ?!?
91557
Show that total orders are maximal orders
2500
Roman numerals used for ordinals
68449
$\operatorname{Supp}(M)=V(\operatorname{Ann}M)$ if $M$ is finitely generated
25769
Finding all posets on a set
32351
Arrangements of MISSISSIPPI with all S's and P's separated
41899
Notation for: all subsets of size 2
137768
Limit Ordinal Question
91770
Python: order in a set of numbers