关于我国高等数学教材的版权发财户

   此刻，在我的书桌上摆放着同济大学数学系编写《高等数学》上册（第六版），定价34.40元人民币。

此书第一版发行至今大约已有30年了。据此，不难估算出同济大学数学系每年的教材版权费至少上数千万元人民币，可谓“版权发财户”。

与此相反，Keisler“Elementary Calculus”遵循知识共享（CC）协议，放飞互联网，可自由下载使用。这是什么思想境界？国内数学界的腐败之风必须反对！

袁萌  6月28日

附：知识共享（CC）版权的目的与目标

Purpose and Goal                       

Creative Commons（知识共享） has been described as being at the forefront（发展前言） of the copyleft movement（版权运动）, which seeks to support the building of a richer public domain by providing an alternative to the automatic "all rights reserved" copyright, and has been dubbed "some rights reserved".^[15] David Berry and Giles Moss have credited Creative Commons with generating interest in the issue of intellectual property and contributing to the re-thinking of the role of the "commons" in the "information age". Beyond that, Creative Commons has provided "institutional, practical and legal support for individuals and groups wishing to experiment and communicate with culture more freely."^[16]

 Creative Commons attempts to counter what Lawrence Lessig, founder of Creative Commons, considers to be a dominant and increasingly restrictive permission culture. Lessig describes this as "a culture in which creators get to create only with the permission of the powerful, or of creators from the past."^[17] Lessig maintains that modern culture is dominated by traditional content distributors in order to maintain and strengthen their monopolies on cultural products such as popular music and popular cinema, and that Creative Commons can provide alternatives to these restrictions.^[18][19]

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