Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

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Welcome to the forum!

sulley wrote:

Could you tell me where I can find more info on this SketchPad application please?

Geometer's Sketchpad: http://www.dynamicgeometry.com/

GeoGebra: www.geogebra.org/

Happy Fibonacci day!

It looks great!

jd1000 wrote:

Hi there!Nice to meet you. I am new to this forum. Hello to everyone out there reading this message! I hope this forum is an excellent platform to express your views !

Welcome to the forum!

You might also want to include some symbols like the symmetric difference, relative complement and aleph-null.

MathsIsFun wrote:

Has anyone else seen I used for irrationals?

No, but neither have I seen "I" represent the "set of imaginary numbers".

bob bundy wrote:

There does not appear to be a regularly used symbol for the irrationals.

I believe the standard is R-Q. Q with a horizontal line on it, or R\Q.

Welcome to the forum!

anonimnystefy wrote:

Does every non-constant periodic function have a smallest positive period?

Take the Dirichlet function for example.

bobbym wrote:

Yes, he can use that for for a shape.

Yeah, I didn't graph this before.

Try using the Shoelace Theorem and then Pick's theorem.

bobbym wrote:

Bounded meaning what here?

I'm assuming he means that there is some real number P such that |f(x)|≤P for all x in the domain of definition of f. So it can't be infinite.

A variant on the bump function?

bobbym wrote:

Hi;

Is this what you want?

Yes.

Don't have Mathematica on here, so had to use Matlab and got:

-0.006070337717140060334526156068061

**ShivamS**- Replies: 6

Can someone with Mathematica solve

0.0004 = 1.47396x10^-8/x^3+0.238 tan(1.38919x10^-9/((35 x^3)/3+(686000 x)/3))

for me quick? Thanks

Agnishom wrote:

ShivamS wrote:Looks good but Euler Avenue, Computer Math and Coder's corner aren't really "fun stuff".

???

I was talking about the way the forum sections are organized. I thought that was what Ganesh was talking about.

Looks good but Euler Avenue, Computer Math and Coder's corner aren't really "fun stuff".

Best of luck for the competition!

PatternMan wrote:

(Problem) At the end of the first chapter and beyond, the book is slightly over my head. I only cover a few pages a day at my current pace because I have to really think about the material and I have other responsibilities. Sometimes I need to look up other references to understand certain things. At my current pace it will take me 10-12 months to finish this book. Is the payoff from reading and understanding this book worth the effort or should I read other books?

The first chapter does not even require much algebra. I think the issue is that you haven't adapted to the style of writing in higher level maths books (although this is really nothing compared to something like Rudin). You'll have to get used to re-reading multiple times and filling in the gaps on your own. Maybe, as I said before, you should supplement it with Apostol to help you.

This book is certainly worth it, no matter how long it takes. It sets you up perfectly for a rigorous multivariate calculus course and real analysis.

Happens in Chrome, Firefox and Opera (I use all 3 occasionally).