Is this a good justification for why integration by substitution works?
47545
What is the rigor behind U subsitution?
83610
Why does substitution work in antiderivatives?
35032
Why is integration so much harder than differentiation?
125848
Intuition behind Probability Integral Transformation
15947
Validity of Substitutions in Integrals
75466
During U-substitution, is the $du$ that we use as the infinitesimal in $\int f(u) \ du$ changing size?
29476
Double integral with transformation; possible error in limits
107572
How does the derivative with respect to the complex conjugate even make sense?
46482
Why does the fundamental theorem of calculus work?
24508
Series as an integral (sophomore's dream)
137291
Why can't Mathematica integrate this?
8502
Why aren't integration and differentiation inverses of each other?
68310
Why can partial derivatives be exchanged?
10790
Integration of a function with respect to another function.
59532
Evaluation of this integral.
122579
How does knowing a function as even or odd help in integration ??
24235
Is there a rule of integration that corresponds to the quotient rule?