On positivity preservation in nonlinear finite volume method for multi-term fractional subdiffusion equation on polygonal meshes

2018 ◽  
Vol 92 (2) ◽  
pp. 595-612 ◽  
Author(s):  
Xuehua Yang ◽  
Qi Zhang ◽  
Guangwei Yuan ◽  
Zhiqiang Sheng
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