摘要
用线性正算子的逼近理论飞速发展，但正性是一个较强的限制，孙永生，王仁宏等研究过减弱正性限制，作者研究用线性弱正算子逼近，推广 Ｋｏｒｏｖｋｉｎ定理和 Ｇｒｕｎｄｍａｎｎ定理等等．
Approximation theory by linear positive operators had been developed at a high speed,but positivity is stronger restriction. Sun Yongsheng and Wang R. H. had researched reducing restriction of positivity, author researches approximation by linear weak positive operators, generalizes Korovkin Theorem and Grundmann Theorem etc.
