OPTIMAL POINT-WISE ERROR ESTIMATE OF TWO SECOND-ORDER ACCURATE FINITE DIFFERENCE SCHEMES FOR THE HEAT EQUATION WITH CONCENTRATED CAPACITY

Leilei Shi, Tingchun Wang, Xuanxuan Zhou

Journal of Computational Mathematics . 2026, (1): 61 -83 . DOI: 10.4208/jcm.2409-m2024-0044