Physics: An Introduction

Physics: An Introduction: This is a complete high school physics textbook. From the table of contents: optics; waves and sound; static electricity; electric circuits; motion; Newton's laws; energy and momentum; modern physics; the atomic nucleus; the nature of nature.

Congruence Lattices of Finite Algebras

Congruence Lattices of Finite Algebras: We review a number of methods for finding a finite algebra with a given congruence lattice, including searching for intervals in subgroup lattices. We also consider methods for proving that algebras with a given congruence lattice exist...