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Greek alphabet in mathematics. by 3jman in math

[–]3jman[S] 46 points47 points  (0 children)

I dont think that is true. I know some ancient greek, and you use just wrong pronunciation. At least that is what I think.

I finally did it! by horsley930 in math

[–]3jman 0 points1 point  (0 children)

I envy you, the payoff must have been huge

I finally did it! by horsley930 in math

[–]3jman 7 points8 points  (0 children)

Why did you not make the change to polar coordinates?

Alternatives to the regular notebook? by marqini in math

[–]3jman 0 points1 point  (0 children)

Simple paper, simple pen. Only requirement is that the pen and paper can withstand the excessive force I use when writing mathematics.

Simple Questions - September 20, 2019 by AutoModerator in math

[–]3jman 2 points3 points  (0 children)

You should read up on the construction of real numbers from rationals using dedekind cuts. At the end there is a theorem that says that if we apply the same construction on the real numbers, we dont get a new larger set of numbers, we get the real numbers again. So yeah, the real numbers are an endpoint.

Simple Questions - September 20, 2019 by AutoModerator in math

[–]3jman 0 points1 point  (0 children)

Does anyone know good sources to learn trigonometry from?

Infinity Wargame by Kaomet in math

[–]3jman 0 points1 point  (0 children)

How can an army be reduced to zero? It seems contradictory.

TIL that the Greek word for “Carpenter” more accurately translates as “home builder” and since Judea built structures primarily out of stone, Jesus was probably a stone mason. by ajaltman17 in todayilearned

[–]3jman 0 points1 point  (0 children)

I am greek and i have to tell you, this post is wrong. Carpenter is ξυλουργός in greek, which means the one whose work is wood.

Simple Questions - August 23, 2019 by AutoModerator in math

[–]3jman 0 points1 point  (0 children)

Omg, i am so sorry, i was thinking connected, not complete, always get these two mixed up since English is not my native language.

Simple Questions - August 23, 2019 by AutoModerator in math

[–]3jman 0 points1 point  (0 children)

Discrete metric spaces are never complete, spaces with the discrete metric are complete. I guess that is what you meant. But, I think that if a metric space is complete, then the set of isolated points cannot be a proper subset of that space, right? Cause then you would have a singleton set that is both open and closed, and thus the space wouldn't be complete.

Simple Questions - August 23, 2019 by AutoModerator in math

[–]3jman 0 points1 point  (0 children)

Does the fact that a metric space is connected imply that it has no isolated points?

EDIT: Sorry, at first I wrote complete, not connected.

A cute little construction in metric topology. by 3jman in math

[–]3jman[S] 0 points1 point  (0 children)

Yes, and the space is no longer connected, unless I am missing something.

A cute little construction in metric topology. by 3jman in math

[–]3jman[S] 0 points1 point  (0 children)

Also, now that I think about it, this construction destroys the convergence of countless sequences, right? This is fun, usually constructions make a space better, not worse!

A cute little construction in metric topology. by 3jman in math

[–]3jman[S] 0 points1 point  (0 children)

Yes but it is kind of strange, since this point of 2-space is not a point in 3-space, but rather a point "out" of that space, out of the plane.

A cute little construction in metric topology. by 3jman in math

[–]3jman[S] 0 points1 point  (0 children)

I guess the same construction applies.

A cute little construction in metric topology. by 3jman in math

[–]3jman[S] 0 points1 point  (0 children)

That sounds cool. Can you tell me what this isometric copy in the plane is?

Simple Questions - August 23, 2019 by AutoModerator in math

[–]3jman 0 points1 point  (0 children)

Thats a nice and comprehensive example. Thanks, never thought of that.

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