# Classical modular forms downloaded from the LMFDB on 31 May 2026. # Search link: https://www.lmfdb.org/ModularForm/GL2/Q/holomorphic/5220/ # Query "{'level': 5220}" returned 53 forms, sorted by analytic conductor. # Each entry in the following data list has the form: # [Label, Dim, $A$, Field, CM, Traces, Fricke sign, $q$-expansion] # For more details, see the definitions at the bottom of the file. "5220.2.a.a" 1 41.68190985510836 "1.1.1.1" [] [0, 0, -1, -5] -1 "q-q^{5}-5q^{7}-5q^{11}-5q^{13}-7q^{17}+\\cdots" "5220.2.a.b" 1 41.68190985510836 "1.1.1.1" [] [0, 0, -1, -3] 1 "q-q^{5}-3q^{7}+3q^{11}+q^{13}+3q^{17}+\\cdots" "5220.2.a.c" 1 41.68190985510836 "1.1.1.1" [] [0, 0, -1, -2] 1 "q-q^{5}-2q^{7}-3q^{11}-2q^{13}+4q^{17}+\\cdots" "5220.2.a.d" 1 41.68190985510836 "1.1.1.1" [] [0, 0, -1, -2] 1 "q-q^{5}-2q^{7}+q^{11}-2q^{17}-2q^{19}+\\cdots" "5220.2.a.e" 1 41.68190985510836 "1.1.1.1" [] [0, 0, -1, -2] -1 "q-q^{5}-2q^{7}+4q^{11}-6q^{13}+4q^{17}+\\cdots" "5220.2.a.f" 1 41.68190985510836 "1.1.1.1" [] [0, 0, -1, -1] 1 "q-q^{5}-q^{7}-3q^{11}-q^{13}+3q^{17}+\\cdots" "5220.2.a.g" 1 41.68190985510836 "1.1.1.1" [] [0, 0, -1, 2] -1 "q-q^{5}+2q^{7}-4q^{11}+2q^{13}+4q^{19}+\\cdots" "5220.2.a.h" 1 41.68190985510836 "1.1.1.1" [] [0, 0, -1, 2] -1 "q-q^{5}+2q^{7}+4q^{11}+2q^{13}+8q^{17}+\\cdots" "5220.2.a.i" 1 41.68190985510836 "1.1.1.1" [] [0, 0, -1, 3] 1 "q-q^{5}+3q^{7}-3q^{11}+3q^{13}-q^{17}+\\cdots" "5220.2.a.j" 1 41.68190985510836 "1.1.1.1" [] [0, 0, -1, 3] 1 "q-q^{5}+3q^{7}+q^{11}-5q^{13}+3q^{17}+\\cdots" "5220.2.a.k" 1 41.68190985510836 "1.1.1.1" [] [0, 0, 1, -2] 1 "q+q^{5}-2q^{7}-q^{11}+2q^{17}-2q^{19}+\\cdots" "5220.2.a.l" 1 41.68190985510836 "1.1.1.1" [] [0, 0, 1, -1] 1 "q+q^{5}-q^{7}+3q^{11}-q^{13}-3q^{17}+\\cdots" "5220.2.a.m" 1 41.68190985510836 "1.1.1.1" [] [0, 0, 1, -1] 1 "q+q^{5}-q^{7}+3q^{11}-q^{13}-3q^{17}+\\cdots" "5220.2.a.n" 1 41.68190985510836 "1.1.1.1" [] [0, 0, 1, 0] -1 "q+q^{5}+2q^{11}-2q^{13}-2q^{19}+8q^{23}+\\cdots" "5220.2.a.o" 1 41.68190985510836 "1.1.1.1" [] [0, 0, 1, 0] -1 "q+q^{5}+6q^{11}+6q^{13}-4q^{17}+2q^{19}+\\cdots" "5220.2.a.p" 1 41.68190985510836 "1.1.1.1" [] [0, 0, 1, 3] 1 "q+q^{5}+3q^{7}-q^{11}-5q^{13}-3q^{17}+\\cdots" "5220.2.a.q" 2 41.68190985510836 "2.2.17.1" [] [0, 0, -2, -5] -1 "q-q^{5}+(-2-\\beta )q^{7}+\\beta q^{11}+(-2+\\cdots)q^{13}+\\cdots" "5220.2.a.r" 2 41.68190985510836 "2.2.57.1" [] [0, 0, -2, 4] -1 "q-q^{5}+2q^{7}+(2-\\beta )q^{11}+2q^{13}+\\cdots" "5220.2.a.s" 2 41.68190985510836 "2.2.33.1" [] [0, 0, 2, -1] -1 "q+q^{5}-\\beta q^{7}+(-2-\\beta )q^{11}+(-2+\\cdots)q^{13}+\\cdots" "5220.2.a.t" 2 41.68190985510836 "2.2.33.1" [] [0, 0, 2, 1] -1 "q+q^{5}+\\beta q^{7}+(-2+\\beta )q^{11}+(-2+\\cdots)q^{13}+\\cdots" "5220.2.a.u" 2 41.68190985510836 "2.2.17.1" [] [0, 0, 2, 2] -1 "q+q^{5}+2\\beta q^{7}+(2-\\beta )q^{11}+6q^{13}+\\cdots" "5220.2.a.v" 2 41.68190985510836 "2.2.17.1" [] [0, 0, 2, 3] 1 "q+q^{5}+(1+\\beta )q^{7}+(1-2\\beta )q^{11}+(-3+\\cdots)q^{13}+\\cdots" "5220.2.a.w" 3 41.68190985510836 "3.3.148.1" [] [0, 0, -3, 2] 1 "q-q^{5}+(1-\\beta _{2})q^{7}+(-1+\\beta _{2})q^{11}+\\cdots" "5220.2.a.x" 3 41.68190985510836 "3.3.564.1" [] [0, 0, 3, -4] 1 "q+q^{5}+(-1+\\beta _{2})q^{7}+(-3-\\beta _{2})q^{11}+\\cdots" "5220.2.a.y" 7 41.68190985510836 NULL [] [0, 0, -7, 0] -1 "q-q^{5}+\\beta _{2}q^{7}-\\beta _{5}q^{11}-\\beta _{6}q^{13}+\\cdots" "5220.2.a.z" 7 41.68190985510836 NULL [] [0, 0, 7, 0] -1 "q+q^{5}+\\beta _{2}q^{7}+\\beta _{5}q^{11}-\\beta _{6}q^{13}+\\cdots" "5220.2.b.a" 4 41.68190985510836 "4.0.336400.1" [-435] [0, 0, 0, 0] NULL "q+\\beta _{2}q^{5}+(-\\beta _{1}+\\beta _{2})q^{11}+(-3\\beta _{1}+\\cdots)q^{23}+\\cdots" "5220.2.b.b" 4 41.68190985510836 "4.0.336400.1" [-435] [0, 0, 0, 0] NULL "q-\\beta _{2}q^{5}+(-\\beta _{1}+\\beta _{2})q^{11}+(3\\beta _{1}+\\beta _{2}+\\cdots)q^{23}+\\cdots" "5220.2.b.c" 14 41.68190985510836 NULL [] [0, 0, -2, 0] NULL "q-\\beta _{1}q^{5}-\\beta _{9}q^{7}-\\beta _{5}q^{11}-\\beta _{6}q^{13}+\\cdots" "5220.2.b.d" 14 41.68190985510836 NULL [] [0, 0, -2, 0] NULL "q-\\beta _{1}q^{5}-\\beta _{9}q^{7}+\\beta _{5}q^{11}-\\beta _{6}q^{13}+\\cdots" "5220.2.b.e" 16 41.68190985510836 NULL [] [0, 0, 2, 0] NULL "q-\\beta _{9}q^{5}+\\beta _{10}q^{7}+\\beta _{8}q^{11}+\\beta _{4}q^{13}+\\cdots" "5220.2.b.f" 24 41.68190985510836 NULL [] [0, 0, 0, 0] NULL NULL "5220.2.g.a" 2 41.68190985510836 "2.0.4.1" [] [0, 0, 4, 0] NULL "q+(i+2)q^{5}+2 i q^{7}-5 q^{11}+4 i q^{17}+\\cdots" "5220.2.g.b" 2 41.68190985510836 "2.0.4.1" [] [0, 0, 4, 0] NULL "q+(-i+2)q^{5}+2 i q^{7}+q^{11}-4 i q^{13}+\\cdots" "5220.2.g.c" 4 41.68190985510836 "4.0.2304.1" [] [0, 0, 0, 0] NULL "q+(-\\beta _{1}+\\beta _{2})q^{5}-\\beta _{1}q^{7}+(1+\\beta _{2}+\\cdots)q^{11}+\\cdots" "5220.2.g.d" 10 41.68190985510836 NULL [] [0, 0, 0, 0] NULL "q+\\beta _{8}q^{5}+(\\beta _{1}-\\beta _{8}-\\beta _{9})q^{7}+(\\beta _{2}-\\beta _{7}+\\cdots)q^{11}+\\cdots" "5220.2.g.e" 12 41.68190985510836 NULL [] [0, 0, -2, 0] NULL "q+\\beta _{9}q^{5}-\\beta _{5}q^{7}+(-\\beta _{8}+\\beta _{9}+\\beta _{10}+\\cdots)q^{11}+\\cdots" "5220.2.g.f" 12 41.68190985510836 NULL [] [0, 0, -2, 0] NULL "q+\\beta _{3}q^{5}-\\beta _{8}q^{7}+(-1+\\beta _{2}-\\beta _{4}+\\cdots)q^{11}+\\cdots" "5220.2.g.g" 14 41.68190985510836 NULL [] [0, 0, 0, 0] NULL "q-\\beta _{5}q^{5}+\\beta _{4}q^{7}+\\beta _{6}q^{11}-\\beta _{12}q^{13}+\\cdots" "5220.2.g.h" 14 41.68190985510836 NULL [] [0, 0, 0, 0] NULL "q+\\beta _{5}q^{5}+\\beta _{4}q^{7}-\\beta _{6}q^{11}-\\beta _{12}q^{13}+\\cdots" "5220.2.l.a" 2 41.68190985510836 "2.0.4.1" [] [0, 0, -2, 2] NULL "q-q^{5}+q^{7}-3 i q^{11}+7 q^{13}-7 i q^{17}+\\cdots" "5220.2.l.b" 2 41.68190985510836 "2.0.4.1" [] [0, 0, -2, 8] NULL "q-q^{5}+4 q^{7}+3 i q^{11}-2 i q^{17}+\\cdots" "5220.2.l.c" 2 41.68190985510836 "2.0.7.1" [] [0, 0, 2, -4] NULL "q+q^{5}-2q^{7}-\\beta q^{11}-2q^{13}+\\beta q^{19}+\\cdots" "5220.2.l.d" 4 41.68190985510836 "4.0.30976.1" [] [0, 0, -4, -4] NULL "q-q^{5}+(-1+\\beta _{3})q^{7}-\\beta _{1}q^{11}+(-2\\beta _{1}+\\cdots)q^{17}+\\cdots" "5220.2.l.e" 4 41.68190985510836 "4.0.67600.1" [] [0, 0, -4, 2] NULL "q-q^{5}+(1-\\beta _{3})q^{7}+(-\\beta _{1}-\\beta _{2})q^{11}+\\cdots" "5220.2.l.f" 4 41.68190985510836 "4.0.67600.1" [] [0, 0, 4, 2] NULL "q+q^{5}+(1-\\beta _{3})q^{7}+(\\beta _{1}+\\beta _{2})q^{11}+\\cdots" "5220.2.l.g" 4 41.68190985510836 "4.0.7168.1" [] [0, 0, 4, 8] NULL "q+q^{5}+(2+\\beta _{3})q^{7}-\\beta _{2}q^{11}+4\\beta _{3}q^{13}+\\cdots" "5220.2.l.h" 6 41.68190985510836 "6.0.399424.1" [] [0, 0, -6, -6] NULL "q-q^{5}+(-1-\\beta _{2})q^{7}+(-\\beta _{1}-\\beta _{4}+\\cdots)q^{11}+\\cdots" "5220.2.l.i" 6 41.68190985510836 "6.0.16516096.2" [] [0, 0, -6, -2] NULL "q-q^{5}-\\beta _{2}q^{7}+(-\\beta _{1}-\\beta _{4})q^{11}+(\\beta _{2}+\\cdots)q^{13}+\\cdots" "5220.2.l.j" 6 41.68190985510836 "6.0.16516096.2" [] [0, 0, 6, -2] NULL "q+q^{5}-\\beta _{2}q^{7}+(\\beta _{1}+\\beta _{4})q^{11}+(\\beta _{2}+\\cdots)q^{13}+\\cdots" "5220.2.l.k" 10 41.68190985510836 NULL [] [0, 0, 10, -4] NULL "q+q^{5}+\\beta _{1}q^{7}+\\beta _{8}q^{11}-\\beta _{1}q^{13}+\\cdots" "5220.2.bl.a" 40 41.68190985510836 NULL [] [0, 0, -40, 0] NULL NULL "5220.2.bl.b" 40 41.68190985510836 NULL [] [0, 0, 40, 0] NULL NULL # Label -- # The **label** of a newform $f\in S_k^{\rm new}(N,\chi)$ has the format \( N.k.a.x \), where # - \( N\) is the level; # - \(k\) is the weight; # - \(N.a\) is the label of the Galois orbit of the Dirichlet character $\chi$; # - \(x\) is the label of the Galois orbit of the newform $f$. # For each embedding of the coefficient field of $f$ into the complex numbers, the corresponding modular form over $\C$ has a label of the form \(N.k.a.x.n.i\), where # - \(n\) determines the Conrey label \(N.n\) of the Dirichlet character \(\chi\); # - \(i\) is an integer ranging from 1 to the relative dimension of the newform that distinguishes embeddings with the same character $\chi$. # Dim -- # The **dimension** of a space of modular forms is its dimension as a complex vector space; for spaces of newforms $S_k^{\rm new}(N,\chi)$ this is the same as the dimension of the $\Q$-vector space spanned by its eigenforms. # The **dimension** of a newform refers to the dimension of its newform subspace, equivalently, the cardinality of its newform orbit. This is equal to the degree of its coefficient field (as an extension of $\Q$). # The **relative dimension** of $S_k^{\rm new}(N,\chi)$ is its dimension as a $\Q(\chi)$-vector space, where $\Q(\chi)$ is the field generated by the values of $\chi$, and similarly for newform subspaces. #$A$ (analytic_conductor) -- # The **analytic conductor** of a newform $f \in S_k^{\mathrm{new}}(N,\chi)$ is the positive real number # \[ # N\left(\frac{\exp(\psi(k/2))}{2\pi}\right)^2, # \] # where $\psi(x):=\Gamma'(x)/\Gamma(x)$ is the logarithmic derivative of the Gamma function. #Field (nf_label) -- # The **coefficient field** of a modular form is the subfield of $\C$ generated by the coefficients $a_n$ of its $q$-expansion $\sum a_nq^n$. The space of cusp forms $S_k^\mathrm{new}(N,\chi)$ has a basis of modular forms that are simultaneous eigenforms for all Hecke operators and with algebraic Fourier coefficients. For such eigenforms the coefficient field will be a number field, and Galois conjugate eigenforms will share the same coefficient field. Moreover, if $m$ is the smallest positive integer such that the values of the character $\chi$ are contained in the cyclotomic field $\Q(\zeta_m)$, the coefficient field will contain $\Q(\zeta_m)$ # For eigenforms, the coefficient field is also known as the **Hecke field**. #CM (cm_discs) -- # A newform $f$ admits a **self-twist** by a primitive # Dirichlet character $\chi$ if the equality # \[ # a_p(f) = \chi(p)a_p(f) # \] # holds for all but finitely many primes $p$. # For non-trivial $\chi$ this can hold only when $\chi$ has order $2$ and $a_p=0$ for all primes $p$ not dividing the level of $f$ for which $\chi(p)=-1$. # The character $\chi$ is then the Kronecker character of a quadratic field $K$ and may be identified by the discriminant $D$ of $K$. # If $D$ is negative, the modular form $f$ is said to have complex multiplication (CM) by $K$, and if $D$ is positive, $f$ is said to have real multiplication (RM) by $K$. The latter can occur only when $f$ is a modular form of weight $1$ whose projective image is dihedral. # It is possible for a modular form to have multiple non-trivial self twists; this occurs precisely when $f$ is a modular form of weight one whose projective image is isomorphic to $D_2:=C_2\times C_2$; in this case $f$ admits three non-trivial self twists, two of which are CM and one of which is RM. #Traces (trace_display) -- # For a newform $f \in S_k^{\rm new}(\Gamma_1(N))$, its **trace form** $\mathrm{Tr}(f)$ is the sum of its distinct conjugates under $\mathrm{Aut}(\C)$ (equivalently, the sum under all embeddings of the coefficient field into $\C$). The trace form is a modular form $\mathrm{Tr}(f) \in S_k^{\rm new}(\Gamma_1(N))$ whose $q$-expansion has integral coefficients $a_n(\mathrm{Tr}(f)) \in \Z$. # The coefficient $a_1$ is equal to the dimension of the newform. # For $p$ prime, the coefficient $a_p$ is the trace of Frobenius in the direct sum of the $\ell$-adic Galois representations attached to the conjugates of $f$ (for any prime $\ell$). When $f$ has weight $k=2$, the coefficient $a_p(f)$ is the trace of Frobenius acting on the modular abelian variety associated to $f$. # For a newspace $S_k^{\rm new}(N,\chi)$, its trace form is the sum of the trace forms $\mathrm{Tr}(f)$ over all newforms $f\in S_k^{\rm new}(N,k)$; it is also a modular form in $S_k^{\rm new}(\Gamma_1(N))$. # The graphical plot displayed in the properties box on the home page of each newform or newspace is computed using the trace form. #Fricke sign (fricke_eigenval) -- # The **Fricke involution** is the Atkin-Lehner involution $w_N$ on the space $S_k(\Gamma_0(N))$ (induced by the corresponding involution on the modular curve $X_0(N)$). # For a newform $f \in S_k^{\textup{new}}(\Gamma_0(N))$, the sign of the functional equation satisfied by the L-function attached to $f$ is $i^{-k}$ times the eigenvalue of $\omega_N$ on $f$. So, for example when $k=2$, the signs swap, and the analytic rank of $f$ is even when $w_N f = -f$ and odd when $w_N f = +f$. #$q$-expansion (qexp_display) -- # The **$q$-expansion** of a modular form $f(z)$ is its Fourier expansion at the cusp $z=i\infty$, expressed as a power series $\sum_{n=0}^{\infty} a_n q^n$ in the variable $q=e^{2\pi iz}$. # For cusp forms, the constant coefficient $a_0$ of the $q$-expansion is zero. # For newforms, we have $a_1=1$ and the coefficients $a_n$ are algebraic integers in a number field $K \subseteq \C$. # Accordingly, we define the **$q$-expansion** of a newform orbit $[f]$ to be the $q$-expansion of any newform $f$ in the orbit, but with coefficients $a_n \in K$ (without an embedding into $\C$). Each embedding $K \hookrightarrow \C$ then gives rise to an embedded newform whose $q$-expansion has $a_n \in \C$, as above.