版权声明

Originally published in English as:

Unknown Quantity: A Real and Imaginary History of Algebra

©John Derbyshire, 2006

First published in English by Joseph Henry Press, an imprint of the National Academies Press. All rights reserved. This edition published under agreement with the National Academy of Sciences

Simplified Chinese - language edition copyright © 2021 by Posts & Telecom Press. All rights reserved.

本书中文简体字版由 Joseph Henry Press 授权人民邮电出版社独家出版。未经出版者书面许可，不得以任何方式复制或传播本书内容。

版权所有，侵权必究。