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集合代数

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Wikipedia definition

1. Algebra of setsThe algebra of sets develops and describes the basic properties and laws of sets, the set-theoretic operations of union, intersection, and complementation and the relations of set equality and set inclusion. It also provides systematic procedures for evaluating expressions, and performing calculations, involving these operations and relations.
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Read “Algebra of sets” on DBpedia

1.3739958562029735

12 strokes. JLPT N4. Jōyō kanji, taught in grade 3.

集

gather, meet, congregate, swarm, flock

Kun: あつ.まる、あつ.める、つど.う

On: シュウ

0.17883755588673625

6 strokes. JLPT N3. Jōyō kanji, taught in grade 2.

合

fit, suit, join, 0.1

Kun: あ.う、 -あ.う、あ.い、あい-、 -あ.い、 -あい、あ.わす、あ.わせる、 -あ.わせる

On: ゴウ、ガッ、カッ

0.43182726909236313

5 strokes. JLPT N4. Jōyō kanji, taught in grade 3.

代

substitute, change, convert, replace, period, age, counter for decades of ages, eras, etc., generation, charge, rate, fee

Kun: か.わる、かわ.る、かわ.り、か.わり、 -がわ.り、 -が.わり、か.える、よ、しろ

On: ダイ、タイ

0.43037330522336525

13 strokes. JLPT N3. Jōyō kanji, taught in grade 2.

数

number, strength, fate, law, figures

Kun: かず、かぞ.える、しばしば、せ.める、わずらわ.しい

On: スウ、ス、サク、ソク、シュ

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