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34-XX - Ordinary differential equations [MSC 2020] |
34A25 - Analytical theory of ordinary differential equations: series, transformations, transforms, operational calculus, etc. [MSC 2020] |
34A30 - Linear ordinary differential equations and systems, general [MSC 2020] |
34B27 - Green functions for ordinary differential equations [MSC 2020] |
39-XX - Difference and functional equations [MSC 2020] |
39A06 - Linear difference equations [MSC 2020] |
39A12 - Discrete version of topics in analysis [MSC 2020] |
39A70 - Difference operators [MSC 2020] |
44A10 - Laplace transform [MSC 2020] |