Phrase guide

Jacobi symbol

noun · 1 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

A mathematical function of integer a and odd positive integer b, generally written (a/b), based on, for each of the prime factors pi of b, whether a is a quadratic residue or nonresidue modulo pi.

Definition source: English Wiktionary via Wiktextract

Topics: mathematics, number-theory, sciences

Examples

  • 2000, Song Y. Yan, Number Theory for Computing, Springer, 2000, Softcover reprint, page 114, Although the Jacobi symbol ((1009)/(2307))=1, we still cannot determine whether or not the quadratic congruence 1009=x2(mod 2307) is soluble. Remark 1.6.10. Jacobi symbols can be used to facilitate the calculation of Legendre symbols.
  • 2014, Ibrahim Elashry, Yi Mu, Willy Susilo, Jhanwar-Barua's Identity-Based Encryption Revisited, Man Ho Au, Barbara Carminati, C.-C. Jay Kuo (editors), Network and System Security: 8th International Conference, Springer, LNCS 8792, page 279, From the above equations, guessing the Jacobi symbol ((2y_is_j_1s_j_2+2)/N) from ((2y_j_1s_j_1+2)/N) and ((2y_j_2s_j_2+2)/N) is as hard as guessing them from independent Jacobi symbols.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

Named after German mathematician Carl Gustav Jakob Jacobi, who introduced the notation in 1837.