who proved the consistency of classical arithmetic in 1936, relying, however, on transfinite induction. Gentzen was also responsible for the first natural deduction approach to formal logic.
科学参考收录了60776条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。