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有些书如果不善于利用,看来价值不大,没有什么大用处,但如果善于利用,则会对读者有很大的帮助与稗益。本书也许就是一个例子。 本书书名虽然叫做《通俗讲话》,如果读者以为这是对数理逻辑作科普性的介绍,以为可以轻松地当作小说来流览阅读,读过以后便搁在一边,那就失掉了本书的主要作用了。事实上这是一本值得仔细阅读而且应该仔细阅读的书。无论初学者或者已经学过数理逻辑的人,都将在仔细阅读以后从中得到收益。顺便说一句,其中三个附录,比较具体容易读懂,初学者如果从三个附录入手,也许会更好一些。
If you are not good at using some books, it seems that the value is not great, no great usefulness, but if you are good at using, it will be of great help to the reader and the benefits. This book may be an example. Although the title of this book is called “popular speech”, if readers think this is a general introduction to mathematical logic, that can easily be used as a novel to browse, read and then put aside, then lost this The main function of the book. In fact, this is a book worth reading carefully and should be read carefully. No matter beginners or those who have already studied mathematical logic, they will benefit from reading them carefully. Incidentally, three of the appendices, more specific and easy to understand, beginners from the three appendices may be better.