编辑同志: 读了贵刊1988年第3期发表的黄振恒的论文《关于二轴晶矿物光性正负判别式的讨论》之后,有以下三方面的意思,读贵刊一角提出供参考。1.通过>N_(450)和有关的示意图来说明旧判别式中的错误,这种作法是有效的,但该文在数学证明上 Editor comrades: After reading your article published in 1988, the third issue of Huang Zhenheng’s paper “on the two-axis crystal light positive and negative discriminant discussion,” the following three aspects, read the corner of your publication for reference. 1. It is effective to explain the errors in the old discriminant by> N_ (450) and related schematic diagrams, but the paper is validated mathematically