Mathematics Subject Classification: *60-01Mathematics Subject Classification: 60H15Mathematics Subject Classification: 60H05Mathematics Subject Classification: 60J25Mathematics Subject Classification: 35-XXMathematics Subject Classification: 35K58Mathematics Subject Classification: 35K59Mathematics Subject Classification: 35Q35Mathematics Subject Classification: 34-XXMathematics Subject Classification: 34F05Mathematics Subject Classification: 34G20Mathematics Subject Classification: 47-XXMathematics Subject Classification: 47J35Mathematics Subject Classification: *60-01Mathematics Subject Classification: 60H15Mathematics Subject Classification: 60H05 | 
