Editing Computational geometry
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==Standard vector notation== | ==Standard vector notation== | ||
− | In writing, vectors are represented as letters with small rightward-pointing arrows over them, ''e.g.'', <math>\ | + | In writing, vectors are represented as letters with small rightward-pointing arrows over them, ''e.g.'', <math>\mathbf{v}</math>. Vectors are usually ''typeset'' in bold, ''e.g.'', <math>\mathbf{v}</math>. We shall denote the components of <math>\mathbf{v}</math> as <math>v_x</math> and <math>v_y</math>. The magnitude of <math>\mathbf{v}</math> may be denoted simply <math>v</math>, or, to avoid confusion with an unrelated scalar variable, <math>\|\mathbf{v}\|</math>. There is a special vector known as the ''zero vector'', the identity translation; it leaves one's position unchanged and has the Cartesian representation [0,0]. We shall represent it as <math>\mathbf{0}</math>. |
==Basic operations== | ==Basic operations== |