Does $\\lim_{(x,y)\\to(0,0)}[x\\sin (1/y)+y\\sin (1/x)]$ exist?
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General expression for determinant of a block-diagonal matrix
You'll need to complete a few actions and gain 15 reputation points before being able to upvote. Upvoting indicates when questions and answers are useful. What's reputation and how do I …
linear algebra - LU Decomposition vs. Cholesky Decomposition ...
What is the difference between LU Decomposition and Cholesky Decomposition about using these methods to solving linear equation systems? Could you explain the difference with a …
$A-(B∩C)=(A−B)∪(B−C)$ proof - Mathematics Stack Exchange
Oct 25, 2015 · You'll need to complete a few actions and gain 15 reputation points before being able to upvote. Upvoting indicates when questions and answers are useful. What's reputation …
Why is Nietzsche so against Socrates? - Philosophy Stack Exchange
Nietzsche recalls the story that Socrates says that 'he has been a long time sick', meaning that life itself is a sickness; Nietszche accuses him of being a sick man, a man against the instincts of...
Proving that $(u+v,u+w,v+w)$ is linearly independent
Mar 17, 2016 · Let $V$ be a vector space over field $f$ with characteristic not equal to 2. Prove that $(u+v,u+w,v+w)$ is linearly independent if and only if $(u,v,w)$ is linearly ...
book recommendation for real analysis - Mathematics Stack …
Mar 29, 2017 · During the next quarter at uni, I'll be taking a course in real analysis and since I prefer studying with an additional text I thought I'd come here to look for some book …
MathCad Variable Undefined (even though I just defined it)
Jan 25, 2011 · Hoping to run into some mathcadders: I have a worksheet which includes the following except (and error) Any help?
linear algebra - Cosine similarity between complex vectors ...
Jan 9, 2013 · Por cierto, es una buena idea votar positivamente una respuesta que te ha ayudado, aunque no necesariamente tienes que aceptarla como la favorita tuya (con la "V" …
logic - How can I prove that (p→q)∧ (p→r) ⇔ p→ (q∧r)
Apr 16, 2019 · How can I prove that (p→q)∧(p→r) compound statements and compound statement p→(q∧r) are logically equivalent? And can I use logical equivalences on this proof?