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1d
comment Conflicting definition of eulerian graph and finite graph?
Take this example, is it a finite graph? It has an even number of vertices with odd valency, but it also has an odd number of vertices with odd valency.
1d
comment Conflicting definition of eulerian graph and finite graph?
Now I get it. It could - for example - have 15 vertices but only two of them having odd valency. Now I understand.
1d
comment Conflicting definition of eulerian graph and finite graph?
@N.S. But if it has 3 vertices, can it still be called a finite graph?
1d
comment Conflicting definition of eulerian graph and finite graph?
Even number of vertices with odd valency. Doesn't it mean that each vertex has odd valency?
Jul
21
comment Prove the reflexivity of $\subseteq$.
@GitGud Yes, but what you mean with "eliminating the universal quantifier"? Is there a process to do it or I just need to throw it away?
Jul
21
comment Prove the reflexivity of $\subseteq$.
@GitGud I don't really know. I've imagined some things but none of them is nice. I remember of the "getting hid of $\forall x$", I've heard a small piece about it in a lecture but I had to leave and didn't get the rest.
Jul
21
comment Prove the reflexivity of $\subseteq$.
@GitGud Excuse me. But what's the difference of $\forall$ and "take an arbitrary $x$"?
Jul
20
comment Is there something that studies equivalent forms of writing and expression?
@JHance Yes, thanks.
Jul
16
comment What do we lose by differentiating without using the rules of differential calculus?
Good point you made in your first sentence. There are rules that are more primitive and these can be used to derive the others, right?
Jul
12
comment Differentiating $\frac{te^{\tan t}}{ln(3t+1)}$?
Excuse me, you wrote "$f_2'\cdot f_1'$ is trivial", shouldn't it be $f_2\cdot f_1'$?
Jul
11
comment Differentiating $\frac{te^{\tan t}}{ln(3t+1)}$?
I am a little confused on this: You need to either use the chain and product rules within the quotient rule using the formula for the quotient rule or use just one large product rule. - Could you show it to me?
Jul
11
comment Differentiating $\frac{te^{\tan t}}{ln(3t+1)}$?
I used the chain rule, using that approach, what should be done next?
Jul
11
comment Differentiating $\frac{te^{\tan t}}{ln(3t+1)}$?
So I should use one of them or the other but not both?
Jul
10
comment Differentiating $\frac{te^{\tan t}}{ln(3t+1)}$?
Then I didn't need to use the chain rule on $e^{\tan(x)}$?
Jul
10
comment Differentiating $\frac{te^{\tan t}}{ln(3t+1)}$?
@TylerHG Thanks for the heads up.
Jul
10
comment Differentiating $\frac{te^{\tan t}}{ln(3t+1)}$?
Thanks for the help. But the way I was doing would also work, wouldn't it? (No, I'm not planning to use it, I'm just making the stupidity test on myself).
Jul
10
comment Differentiating $\frac{te^{\tan t}}{ln(3t+1)}$?
@TylerHG Yes. It was a poor adaptation from portuguese. I thought one could employ "derive" in english.
Jun
27
comment Are there non-trivial systems of arithmetic in which the order of precedence of the operators does not change the output?
@Thoth19 Thanks for the heads up!
Jun
27
comment What's the importance of a formula for the real and imaginary parts of a complex number?
I see. I still didn't read about complex numbers expressed in that way. I just discovered a few seconds ago that they are called complex numbers in the exponential form.
Jun
23
comment Good textbooks and articles from arXiv for undergraduate students?
@Zircht Sorry, I've downloaded the source and tried to open without success. Any hints?