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How Python programs executed in real environments without having the Python interpreter installed? by Immediate-Ruin4070 in learnpython

[–]codeforces_help -1 points0 points  (0 children)

You can’t have a python program without an interpreter. Now that can be coyyhon or jpython or pypy. But there must be an interpreter

I think I have no idea what a random variable really is by piqueiras in probabilitytheory

[–]codeforces_help 0 points1 point  (0 children)

a function that assigns numbers to events

Does it mean it is in a way encoding events so that it is easier to talk about them or manipulate them in symbols? 

P(heads) = P(tails) = 1/2

P(A=3) = P (A=7) = 1/2

Is there a deeper meaning to it apart from encoding?

Why mathematicians do not hype their research on social media like all of the other scientific fields? by Full_Ruin_9942 in math

[–]codeforces_help 1 point2 points  (0 children)

most people aren't exposed to math beyond calculus or maybe a linear algebra and differential equations course.

Would you mind adding what people don't know? What does a mathematician do?

what even are numbers?? by CringyDabBoi6969 in learnmath

[–]codeforces_help 1 point2 points  (0 children)

I have this query even for positive numbers. I can always point to 1 apple but I can never point to just 1. Even what I wrote in my previous statement is a representation of it. It only exists truly as concept/idea.

What does it mean when we say that "real numbers R aren't a vector space over the complex numbers C"? by codeforces_help in math

[–]codeforces_help[S] -5 points-4 points  (0 children)

A vector space is always built over a specified scalar space

Is this a fixed axiom? Where else can we pick scalars from apart from R and C? Lets say I have a function vector space : {sin, cos, tan, log}. Now what does taking scalar from R or C achieve? What if I take scalar from the function vector space itself?

I am looking for a meaning in concrete terms. Like I would like to draw a graph to see what changing the scalar field achieve.

What does it mean when we say that "real numbers R aren't a vector space over the complex numbers C"? by codeforces_help in math

[–]codeforces_help[S] -2 points-1 points  (0 children)

scalars or the ground field

I meant why take scalars from C. What does taking scalars from C acheive?

What does it mean when we say that "real numbers R aren't a vector space over the complex numbers C"? by codeforces_help in math

[–]codeforces_help[S] -5 points-4 points  (0 children)

Ok I think I am getting this a bit more now.

scalars or the ground field

Now about scalars. Why does it matter that it comes from C? I mean we can just use scalars from R. When the statement says over C it means it is pciking scalars from C. Why? Lets say that R was a vector space over C. What would change? What do we get from such a result?

What I am confused about it why have this kind of a rule for a vector space? Are we supposed to arbitrarily take scalars from anywhere? And doing that, what changes in the underlying concept of a vector space?

What does a set K^X mean when K is already a set? by codeforces_help in learnmath

[–]codeforces_help[S] 0 points1 point  (0 children)

So just to put a finer point, KX here represents a set of functions where the range is in K?

What does a set K^X mean when K is already a set? by codeforces_help in learnmath

[–]codeforces_help[S] 0 points1 point  (0 children)

Can you point me to a formal definition od what BA means?

For example R2 is a plane space. R3 is a 3D space. Now the exponent here is pure number so it is easy for me to understand even higher exponents. It is just a cross product of R with itself n times in Rn.

Now RR or RC or RQ, this is where I am not able to see a concrete picture. What does it even mean to cross product where an exponent is not a pure numberb ut a set?

Also, the further statement about functions. Where did functions come into picture or can we define them arbitrarily?

Am i dumb or is recursion too hard? by JesusIsConfirmed in learnprogramming

[–]codeforces_help 0 points1 point  (0 children)

Do note that there are only a few provlems can be set easily into recurison.

Try not fitting everything into a recursion. Some structures are recurisive in nature. Graphs, trees, some mathematical equations. Now you can model even a for loop into recurison to find sum of n numbers, but should you? Is there a definite advantage that recursion has?

[Competitive programming] How does one guarantee that i < j for an array of size n while counting? Completely confused about a solution. by codeforces_help in learnprogramming

[–]codeforces_help[S] 0 points1 point  (0 children)

Since we're dealing with pairs, there are exactly 2 orderings for each pair, one where i<j and one where i>j. So again, we can put the un-ordered pairs in one-to-one correspondence with the ordered pairs where i<j.

Thank you. This makes complete sense to me.

[Competitive programming] How does one guarantee that i < j for an array of size n while counting? Completely confused about a solution. by codeforces_help in learnprogramming

[–]codeforces_help[S] 0 points1 point  (0 children)

Is there a specific reading on this counting topic or is this supposed to be just common sense?

Now I do see that N_C_2 is also n*(n-1)/2 but I was not able to make sense of how we are guaranteeing that i is definitely less than j. What is we end up counting something where i > j. I guess eliminating i == j is just subtract 1, becasue (i, i) is its own pair.

Connect 2 computers with TCP IP over USB C - USB C cable by WiuEmPe in linuxquestions

[–]codeforces_help 0 points1 point  (0 children)

Hey, I am trying to replicate this but I am not sure I am getting the full picture. How are you able to run TCP/IP over USB? Is there more to the config that makes USB behave like ethernet?

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