Last Updated：2025/12/31
Sentence
Category
theory
also
contributes
new
proof
techniques,
such
as
diagram
chasing
or
arguments
by
duality;
Steenrod
called
these
methods
“abstract
nonsense.”³
The
aim
of
this
text
is
to
introduce
the
language,
philosophy,
and
basic
theorems
of
category
theory.
A
complementary
objective
is
to
put
this
theory
into
practice:
studying
functoriality
in
algebraic
topology,
naturality
in
group
theory,
and
universal
properties
in
algebra.
Quizzes for review
Category theory also contributes new proof techniques, such as diagram chasing or arguments by duality; Steenrod called these methods “abstract nonsense.”³ The aim of this text is to introduce the language, philosophy, and basic theorems of category theory. A complementary objective is to put this theory into practice: studying functoriality in algebraic topology, naturality in group theory, and universal properties in algebra.
音声機能が動作しない場合はこちらをご確認ください
English - English
Word Edit Setting
- Users who have edit permission for words - All Users
- Screen new word creation
- Screen word edits
- Screen word deletion
- Screen the creation of new headword that may be duplicates
- Screen changing entry name
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
Sentence Edit Setting
- Users who have edit permission for sentences - All Users
- Screen sentence deletion
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
Quiz Edit Setting
- Users who have edit permission for quizzes - All Users
- Users authorized to vote on judging - Editor
- Number of votes required for decision - 1
