modular form

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1: Frank Garvan
… ►His research is in the areas of q -series and modular forms, and he enjoys using MAPLE in his research. …
2: 23.15 Definitions
… ►If, as a function of q , f ⁡ ( τ ) is analytic at q = 0 , then f ⁡ ( τ ) is called a modular form. If, in addition, f ⁡ ( τ ) → 0 as q → 0 , then f ⁡ ( τ ) is called a cusp form. …
3: 23.18 Modular Transformations
… ►and λ ⁡ ( τ ) is a cusp form of level zero for the corresponding subgroup of SL ( 2 , ℤ ) . … ► J ⁡ ( τ ) is a modular form of level zero for SL ( 2 , ℤ ) . …
4: Bibliography K
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  • N. Koblitz (1993) Introduction to Elliptic Curves and Modular Forms. 2nd edition, Graduate Texts in Mathematics, Vol. 97, Springer-Verlag, New York.
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    5: 21.5 Modular Transformations
    … ►The modular transformations form a group under the composition of such transformations, the modular group, which is generated by simpler transformations, for which ξ ⁡ ( 𝚪 ) is determinate: …
    6: Bibliography M
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  • H. Maass (1971) Siegel’s modular forms and Dirichlet series. Lecture Notes in Mathematics, Vol. 216, Springer-Verlag, Berlin.
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    7: Bibliography C
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  • G. Cornell, J. H. Silverman, and G. Stevens (Eds.) (1997) Modular Forms and Fermat’s Last Theorem. Springer-Verlag, New York.
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    8: 27.16 Cryptography
    … ►To code a piece x , raise x to the power r and reduce x r modulo n to obtain an integer y (the coded form of x ) between 1 and n . Thus, y ≡ x r ( mod n ) and 1 ≤ y < n . … ►By the Euler–Fermat theorem (27.2.8), x ϕ ⁡ ( n ) ≡ 1 ( mod n ) ; hence x t ⁢ ϕ ⁡ ( n ) ≡ 1 ( mod n ) . But y s ≡ x r ⁢ s ≡ x 1 + t ⁢ ϕ ⁡ ( n ) ≡ x ( mod n ) , so y s is the same as x modulo n . …
    9: 23.21 Physical Applications
    §23.21 Physical Applications
    … ►In §22.19(ii) it is noted that Jacobian elliptic functions provide a natural basis of solutions for problems in Newtonian classical dynamics with quartic potentials in canonical form ( 1 − x 2 ) ⁢ ( 1 − k 2 ⁢ x 2 ) . … ►
    §23.21(iv) Modular Functions
    ►Physical applications of modular functions include: … ►
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    String theory. See Green et al. (1988a, §8.2) and Polchinski (1998, §7.2).

  • 10: 27.12 Asymptotic Formulas: Primes
    … ►A Mersenne prime is a prime of the form 2 p − 1 . … ►For example, if 2 n ⁢ ≡ ⁢ 2 ( mod n ) , then n is composite. … ►A Carmichael number is a composite number n for which b n ≡ b ( mod n ) for all b ∈ ℕ . …