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# SYMMETRY AN INTRODUCTION TO GROUP THEORY AND ITS APPLICATIONS ROY MCWEENY Introduction to gauge theory - Wikipedia
A gauge theory is a type of theory in physics word gauge means a measurement, a thickness, an in-between distance (as in railroad tracks), or a resulting number of units per certain parameter (a number of loops in an inch of fabric or a number of lead balls in a pound of ammunition). Modern theories describe physical forces in terms of fields, e.g., the
Symmetry (physics) - Wikipedia
In physics, a symmetry of a physical system is a physical or mathematical feature of the system (observed or intrinsic) that is preserved or remains unchanged under some transformation. A family of particular transformations may be continuous (such as rotation of a circle) or discrete (e.g., reflection of a bilaterally symmetric figure, or rotation of a regular polygon).
Symmetry And Line Of Symmetry: An Introduction - BYJUS
In geometry, symmetry is defined as a balanced and proportionate similarity that is found in two halves of an object. It means one-half is the mirror image of the other half. The imaginary line or axis along which you can fold a figure to obtain the symmetrical halves is called the line of symmetry. If an object is symmetrical, it means that it is equal on both sides.
10 Crystal Morphology and Symmetry – Mineralogy
10.1 Symmetry 10.1.1 Introduction. The shape of a crystal reflects its internal atomic arrangement, and the most important aspect of a crystal’s shape is its symmetry. In group theory, the 13 operators listed in the table above form a basis, which means we need no other operators to describe all possible manifestations of symmetry.       