Meaning of “number theory” in the English Dictionary

american-english dictionary

"number theory" in British English

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number theorynoun [ U ]

/ˈnʌm.bə ˌθɪə.ri/ /ˈnʌm.bɚ ˌθɪr.i/ specialized

the study of the qualities and characteristics of numbers

(Definition of “number theory” from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)

"number theory" in American English

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number theorynoun [ U ]

/ˈnʌm·bər ˌθɪər·i/

mathematics the study of the qualities and characteristics of numbers

(Definition of “number theory” from the Cambridge Academic Content Dictionary © Cambridge University Press)