Is the following proof of the "cancellation of dots" correct?
16644
Why does cancellation of dots $\frac{\partial \dot{\mathbf{r}}_i}{\partial \dot{q}_j} = \frac{\partial \mathbf{r}_i}{\partial q_j}$ work?
125348
Does $\det(A + B) = \det(A) + \det(B)$ hold?
147528
Where's the error in this $2=1$ fake proof?
1002
Where is the flaw in this "proof" that 1=2? (Derivative of repeated addition)
103463
Mantel's Theorem proof verification
40048
Finding the fallacy in this broken proof
12728
\dots versus \ldots - is there a difference?
133884
A proof using Yoneda lemma
9696
The interval [0,1] andd [3,5] are equivalent. Is my proof correct?
83778
An incorrect proof by exhaustion
13768
Origin of the dot and cross product?
22842
The Interpretation of $|\psi|^2$ and the No-Clone Theorem
148355
Regarding Goldstein's claim that $\mathbf{F} = \dot{\mathbf{p}}$
107281
Proof of Existence of Algebraic Closure: Too simple to be true?
61604
$V = V_1 + V_2$ confusion? Why is my "proof "incorrect?
83022
Proof of this fairly obscure differentiation trick?
17670
If $p\in R[X_1,\dots,X_n]$ is irreducible, is it still irreducible in $R[X_1,\dots,X_n,\dots,X_N]$?