35Lxx Hyperbolic equations and systems [See also 58J45]
 35L02 Firstorder hyperbolic equations
 35L03 Initial value problems for firstorder hyperbolic equations
 35L04 Initialboundary value problems for firstorder hyperbolic equations

35L05 Wave equation
(1)
 35L10 Secondorder hyperbolic equations
 35L15 Initial value problems for secondorder hyperbolic equations
 35L20 Initialboundary value problems for secondorder hyperbolic equations
 35L25 Higherorder hyperbolic equations
 35L30 Initial value problems for higherorder hyperbolic equations
 35L35 Initialboundary value problems for higherorder hyperbolic equations
 35L40 Firstorder hyperbolic systems

35L45 Initial value problems for firstorder hyperbolic systems
(2)

35L50 Initialboundary value problems for firstorder hyperbolic systems
(1)
 35L51 Secondorder hyperbolic systems
 35L52 Initial value problems for secondorder hyperbolic systems
 35L53 Initialboundary value problems for secondorder hyperbolic systems
 35L55 Higherorder hyperbolic systems
 35L56 Initial value problems for higherorder hyperbolic systems
 35L57 Initialboundary value problems for higherorder hyperbolic systems
 35L60 Nonlinear firstorder hyperbolic equations
 35L65 Conservation laws
 35L67 Shocks and singularities [See also 58Kxx, 76L05]
 35L70 Nonlinear secondorder hyperbolic equations
 35L71 Semilinear secondorder hyperbolic equations
 35L72 Quasilinear secondorder hyperbolic equations
 35L75 Nonlinear higherorder hyperbolic equations
 35L76 Semilinear higherorder hyperbolic equations
 35L77 Quasilinear higherorder hyperbolic equations
 35L80 Degenerate hyperbolic equations
 35L81 Singular hyperbolic equations
 35L82 Pseudohyperbolic equations
 35L85 Linear hyperbolic unilateral problems and linear hyperbolic variational inequalities [See also 35R35, 49J40]
 35L86 Nonlinear hyperbolic unilateral problems and nonlinear hyperbolic variational inequalities [See also 35R35, 49J40]
 35L87 Unilateral problems and variational inequalities for hyperbolic systems [See also 35R35, 49J40]
 35L90 Abstract hyperbolic equations
 35L99 None of the above, but in this section