نتایج جستجو برای: simple reflection

تعداد نتایج: 514512  

We give a necessary and sufficient condition for the preservation of finite products by a reflection of a variety of universal algebras into an idempotent subvariety. It is also shown that simple and semi-left-exact reflections into subvarieties of universal algebras are the same. It then follows that a reflection of a variety of universal algebras into an idempotent subvariety has stable units...

Journal: :Discrete Applied Mathematics 2016

Journal: :Revista Eletrônica em Gestão, Educação e Tecnologia Ambiental 2019

Journal: :Discrete Applied Mathematics 2016
Gill Barequet Sarah Cannon Eli Fox-Epstein Benjamin Hescott Diane L. Souvaine Csaba D. Tóth Andrew Winslow

We prove a conjecture of Aanjaneya, Bishnu, and Pal that the maximum number of diffuse reflections needed for a point light source to illuminate the interior of a simple polygon with n walls is bn/2c − 1. Light reflecting diffusely leaves a surface in all directions, rather than at an identical angle as with specular reflections.

2006
Ülo Nurges

A robust version of the output controller design for discrete-time systems is introduced. Instead of a single stable point a stable polytope (or simplex) is preselected in the coefficient space of closed-loop characteristic polynomials. A constructive procedure for generating stable simplexes is given starting from the unit hypercube of reflection coefficients of monic polynomials. This procedu...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه تربیت مدرس - دانشکده علوم انسانی 1390

supervisors play an undeniable role in training teachers, before starting their professional experience by preparing them, at the initial years of their teaching by checking their work within the proper framework, and later on during their teaching by assessing their progress. but surprisingly, exploring their attributes, professional demands, and qualifications has remained a neglected theme i...

Journal: :Pacific Journal of Mathematics 1974

2007
Chunhui Mei Voicu Popescu Elisha Sacks

We propose a two phase hybrid reflection rendering method based on approximating the reflected rays with a set of simple cameras modeled as continuous 3-ray cameras. In the first, "backward", phase, the view volume of each simple camera is intersected with a hierarchical subdivision of the scene to find the geometry it encompasses. In the second, "forward", phase the geometry is projected with ...

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