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Analysis
- In analysis, partial, approximate solutions are meaningful when we know what kind of answer we are seeking and we are solving backwards from there.
Differentiation
Analytic symmetry
- df/dx = f. Can be expressed through the notion of infinity (Taylor series) {$e^x$}. Or through periodicity (trigonometry, Euler's equation) {$e^{ix}$}
- Differential equations for engineers