This book covers all areas of mathematical science. The contributions by the authors include second-order ( ?,?)-(pseudo/quasi)-convexity; multiobjective programming; second-order duality, duality theorem; common fixed point; generalized weak contraction; altering distance; invariant approximation; nonlinear oscillators; equivalent linearization method; weighted averaging; autoregressive models; distributed lag model; macroeconomic time series; multiresolution analysis; wavelet theory; Swallowtail model; polynomial regression; generalized Riesz systems; non-self-adjoint Hamiltonian; quasi-Hermitian quantum mechanics; biorthogonal sequences; limit distribution; generalized Ornstein-Uhlenbeck processes; Ergodic theorem; Bivariate normal distribution; morgenstern type bivariate logistic distribution; morgenstern type bivariate exponential distribution; best linear unbiased estimation; coefficient variation; concomitants of order statistics; conformable fractional derivative; conformable fractional PDEs; closed form solution etc. This book contains various materials suitable for students, researchers and academicians in the field of mathematical science.
