A stiff problem Robertson’s chemical reaction model

[jiweiqi]

Plan to run a stiff problem to synthesis the difficulty of combustion problems.

Robertson's chemical reaction model is typically used to test algorithms for stiff problems.

http://www.dam.brown.edu/people/alcyew/handouts/numODE5.pdf

[jiweiqi]

https://www.radford.edu/~thompson/vodef90web/problems/demosnodislin/Single/DemoRobertson/demorobertson.pdf