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Laplace operatorDifferential operatorFormal derivativeLaplace-de rham operatorIntegro-differential equationPseudodifferential operatorElliptic operatorSesquilinear formQuadraticLaplace's equationDivisor functionDelta potentialHilbert transformOrdinary differential equationDirac adjointDirichlet convolutionHessian matrixTwo-sided laplace transformDerivationDifferential equationMellin transformPartial differential equationDyadicsOperator theoryDiscrete laplace operatorMatrix differential equationDifferintegralLogarithmic normLogarithmic meanOrdered exponentialSquare root of a matrixSquare-integrable functionSingular valueDifferential invariantSecond derivativeDeterminantSquare triangular numberSchwarzian derivativeDeterminantal point processPoisson algebraKronecker deltaMatrix exponentialRadical symbolQuantum operationLax pairRational numberEigenfunctionLinear differential equationLie algebraBeta functionDifference of two squaresDyadic rationalConvex conjugatePoisson kernelSquare numberPseudo-differential operatorGraph fourier transformPolar decompositionPythagorean additionDarboux integralParametrixCartan decompositionDivisor summatory functionShift operatorCharacteristic polynomialSign functionExact differential equationHilbert matrixFrobenius inner productSine-gordon equationSecond covariant derivativeMatrix sign functionResolvent formalismQuadratic reciprocityInverse function ruleSymmetric derivativeClifford algebraAlgebraic numberD'alembert's formulaDirac equation in curved spacetimeTangent half-angle formulaDirac deltaLiouville field theoryLerch zeta functionFractional fourier transformQuotient ruleHermitian adjointBinary quadratic formDiophantine equationDirac delta functionLegendre transformationRiccati equationPseudo-euclidean spacePythagorean trigonometric identityProbability-generating functionPovmSquare rootJacobi identityInvolutionD'alembert's equation