Results 161 to 170 of about 61,340 (312)

Nonexistence of solutions to systems of higher-order semilinear inequalities in cone-like domains

Electronic Journal of Differential Equations, 2002
In this paper, we obtain nonexistence results for global solutions to the system of higher-order semilinear partial differential inequalities $$displaylines{ frac{partial^k u_i}{partial t^k}-Delta (a_i (x,t) u_i (x,t)) geq t^{gamma_{i+1}}|x|^{sigma_{i+1}}
Abdallah El Hamidi, Gennady G. Laptev
doaj  

Nonexistence of a continuous right inverse for parabolic differential operators

, 1969
David K. Cohoon
openalex   +1 more source

The Nonexistence of Linked Block Designs with Latin Square Association Schemes [PDF]

, 1970
Peter W. M. John
openalex   +1 more source

Comparative benefits of environmental protection expenditures and environmental taxes in driving environmental quality of the European countries

Natural Resources Forum, EarlyView.
Abstract Environmental protection and tax policies are part of the crucial pillars and the evolving aspects of environmental sustainability drive. These policies are increasingly employed to counter the 21st century's global climate problem alongside providing economic relief for the implementing economies.
Saffet Akdag, Hakan Yildirim, Andrew Adewale Alola   +2 more
wiley   +1 more source

Nonexistence of global solutions for fractional temporal Schrodinger equations and systems

Electronic Journal of Differential Equations, 2017
We, first, consider the nonlinear Schrodinger equation $$ i^\alpha {}_0^C D_t^\alpha u+\Delta u= \lambda |u|^p+\mu a(x)\cdot\nabla |u|^q, \quad t>0,\; x\in \mathbb{R}^N, $$ where 0q>1$, $u(t,x)$ is a complex-valued function, and $a: \mathbb{R}^N\to ...
Ibtehal Azman, Mohamed Jleli, Mokhtar Kirane, Bessem Samet   +3 more
doaj  

On the nonexistence of finite projective planes of Lenz-Barlotti Type I6

, 1966
Judita Cofman
openalex   +1 more source

Intraspecific variation of thermal tolerance along elevational gradients: the case of a widespread diving beetle (Coleoptera: Dytiscidae)

Insect Science, EarlyView.
• We explored intraspecific variation of thermal tolerance among populations of a widespread diving beetle across an elevational gradient.• We found no evidence of local adaption of thermal tolerance along the elevational gradient and limited plasticity of thermal limits.• Our results suggest thermal niche conservatism as a result of gene flow or ...
Susana Pallarés, José Antonio Carbonell, Félix Picazo, David T. Bilton, Andrés Millán, Pedro Abellán   +5 more
wiley   +1 more source

Existence of positive solutions for singular eigenvalue problems

Electronic Journal of Differential Equations, 2006
In this paper, we discuss the existence, nonexistence, and multiplicity of positive solutions for a class of singular eigenvalue problems. Some of our theorems are new, while others extend earlier results obtained by Zhang and Kong [12].
Meiqiang Feng, Weigao Ge
doaj  

The mark or trace of a criminal record: A survey experiment of race and criminal record signaling

Criminology, EarlyView.
Abstract Employment discrimination from a criminal record is a salient social fact, evidenced by a robust body of experimental research. In Part 1 of this study, we analyze prior criminal record hiring experiments—comprising in‐person audits, online audits, and opt‐in surveys—to describe patterns over time in employer receptivity to applicants of ...
Sarah Lageson, Robert Apel
wiley   +1 more source

Comparison of survival benefit and safety profile between lenvatinib and donafenib as conversion therapy in patients with hepatocellular carcinoma. [PDF]

Am J Transl Res
Hou Y, Gao Z, Han Y, Liu C, Su X, Zhang D.   +5 more
europepmc   +1 more source