An essay on the foundations of geometry · Bertrand Russell
Chapter 1
Italic text is denoted by _underscores_. Bold text is denoted by =equal signs=. A superscript is denoted by ^{x}. For example, y^{4} indicates y to the power 4. A subscript is denoted by {x}. For example, a{ik} indicates the ik-th element of array a. Algebraic expressions in the original text usually had the variables in italic. The italic underscore markup has been removed for readability, so for example: _dx_{i}_ = λ′_d_′_x_{i}_ + λ″_d″x_{i}_ has been changed to: dx{i} = λ′d′x{i} + λ″d″x{i} Obvious typographical errors and punctuation errors have been corrected after careful comparison with other occurrences within the text and consultation of external sources. More detail can be found at the end of the book. London: C. J. CLAY AND SONS, Glasgow: 263, ARGYLE STREET. Leipzig: F. A. BROCKHAUS. New York: THE MACMILLAN COMPANY. Bombay: GEORGE BELL AND SONS. [_All Rights reserved._] Cambridge: PRINTED BY J. AND C. F. CLAY, AT THE UNIVERSITY PRESS.
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