Results 51 to 60 of about 6,610,093 (192)
Molecules, 2021 Single crystal of furazolidone (FZL) has been successfully obtained, and its crystal structure has been determined. Common and distinctive features of furazolidone and nitrofurantoin (NFT) crystal packing have been discussed.
Alex N. Manin +4 more
doaj +1 more source
Solution of Supplee's submarine paradox through special and general relativity
, 2016 In 1989 Supplee described an apparent relativistic paradox on which a submarine seems to sink to observers at rest within the ocean, but it rather seems to float in the submarine proper frame. In this letter, we show that the paradox arises from a misuse
Vieira, R. S.
core +1 more source
New class of practically solvable systems of difference equations of hyperbolic-cotangent-type
Electronic Journal of Qualitative Theory of Differential Equations, 2020 The systems of difference equations $$x_{n+1}=\frac{u_nv_{n-2}+a}{u_n+v_{n-2}},\quad y_{n+1}=\frac{w_ns_{n-2}+a}{w_n+s_{n-2}},\quad n\in\mathbb{N}_0,$$ where $a, u_0, w_0, v_j, s_j$ $j=-2,-1,0,$ are complex numbers, and the sequences $u_n$, $v_n,$ $w_n$,
Stevo Stevic
doaj +1 more source
Pharmaceutics, 2023 Polymorphism is a common phenomenon among single- and multicomponent molecular crystals that has a significant impact on the contemporary drug development process. A new polymorphic form of the drug carbamazepine (CBZ) cocrystal with methylparaben (MePRB)
Artem O. Surov +6 more
doaj +1 more source
Pseudo-differential operators and equations in a discrete half-space
Mathematical Modelling and Analysis, 2018 We introduce a digital pseudo-differential operator acting in discrete Sobolev--Slobodetskii spaces and consider pseudo-differential equations with such operators in a discrete half-space.
Alexander V. Vasilyev +1 more
doaj +1 more source
, 2010 A general, system-independent formulation of the parabolic Schr\"odinger-Poisson equation is presented for a charged hard wall in the limit of complete screening by the ground state.
Ando +19 more
core +1 more source
Journal of Kufa for Mathematics and Computer, 2012 Our aim in this paper is to find the general solution of the beloved equation which its general form is given by                                      u″(x)+3u(x)u′(x)+u3(x)=0  by using suitable substitution .
Ali Hassan Mohammed, Sattar naser ketap
doaj +1 more source
General solutions’ laws of linear partial differential equations II
Partial Differential Equations in Applied Mathematics, 2023 This paper uses Z transformations to obtain the general solutions of a large number of second-order, third-order and fourth-order linear partial differential equations for the first time, including one-dimensional inhomogeneous wave equation.
Hong Lai Zhu
doaj +1 more source
Solvability and construction of solutions of integral equations
Вестник КазНУ. Серия математика, механика, информатика, 2017 A class of integral equations with respect to one variable function as well as to multivariable function that are solvable for any right hand side of an equation has been singled out. A necessary and sufficient condition for existence of a solution has
С. А. Айсагалиев +2 more
doaj
General solution of classical master equation for reducible gauge theories
, 2012 We give the general solution to the classical master equation (S,S)=0 for reducible gauge theories. To this aim, we construct a new coordinate system in the extended configuration space and transform the equation by changing variables.
A. V. Bratchikov +16 more
core +1 more source