wrobel's latest activity
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wrobel replied to the thread Collection of Lame Jokes.text: normal distribution, abnormal distribution, paranormal distribution, normal distribution inside a boa constrictor -
wrobel replied to the thread Undergrad Curl of velocity vector in rotational motion.The angular velocity of a rigid body is defined by the Euler formula: $$\boldsymbol{v}_A=\boldsymbol... -
wrobel replied to the thread Graduate A neat fact regarding Cauchy problems for infinite systems.I am confident that this theorem is not new. Its proof relies heavily on Zorn's lemma, which is also not surprising -
wrobel posted the thread Graduate A neat fact regarding Cauchy problems for infinite systems in General Math.Hi everyone, I would like to share a result regarding the existence of solutions for systems of ordinary differential equations with an... -
wrobel replied to the thread Another nice problem from Savchenko.I fed my English translation of this problem (from the initial post) to an AI. It correctly recognized it as problem number 2.1.51 from... -
wrobel replied to the thread Another nice problem from Savchenko.????? By definition, purely translational motion is when all the points of a rigid body move with the same velocity -
wrobel replied to the thread Another nice problem from Savchenko.My version is $$L=mr^2\dot\theta^2(1+\cos\alpha)+mgr\theta\sin\alpha$$ hopefully that is the same:) -
wrobel replied to the thread Graduate Another similar notion to compactness.Any set can be covered by a finite intersection of closed sets; simply take its closure. Furthermore, the closure of a set is itself the... -
wrobel replied to the thread Undergrad The vector to which a dual vector corresponds.Almost always, the field of scalars is the field of real or complex numbers. -
wrobel replied to the thread Undergrad The vector to which a dual vector corresponds.The book is pointless. The author yanked random bits from differential geometry, linear algebra, calculus, and physics. It’s the best... -
wrobel replied to the thread High School Newton's first law?."No forces" and "zero net force" are in fact the same thing, since we are considering a single particle. If you have a particle at... -
wrobel replied to the thread Sick nonholonomic problem.Do that. will see how GPT deals with it

