
Please post any and all homework or other textbookstyle problems in one of the Homework & Coursework Questions...

Feb2313 09:23 AM
micromass

1 
39,224 
I want to map the temperature gradient in my part of town. I live within spitting distance of the lake and want to...

Sep1007 04:47 PM
DaveC426913

9 
2,252 
Hey, does anyone knwo of a program that can train you in different basic fields of mathematics, and preferrably keep...

Sep1007 03:29 PM
menager31

9 
6,019 
What is SUBSET on “open subset of R^{n}"?
How supposed I imagine the following equations?
u : U → R

Sep1007 01:08 PM
JonF

1 
1,235 
A gift shop sells pewter mugs for $35. They are currenly running an engraving promotion. The first six letter are...

Sep1007 06:33 AM
JonF

11 
4,846 
Why the mathematician call identification topology "quotient topology"?from my viewpoint,identification topology bear...

Sep1007 06:29 AM
navigator

3 
1,450 
(1)
using stokes theorem and cutting the surface into 2 parts how can we prove that
\int curl A.n dS = 0
...

Sep1007 06:25 AM
mathwonk

22 
5,336 
how could i expand something such as arctan'x into a power series. also how would you be able to find the power series...

Sep1007 05:41 AM
HallsofIvy

7 
28,185 
I've been really stumped by this one from my math class. It's a two variable trig. question with two equations. I...

Sep907 04:30 PM
rocomath

7 
1,448 
I have tried this question (http://img524.imageshack.us/img524/9539/scan0001pa1.png) a number of times and always use...

Sep907 07:32 AM
HallsofIvy

10 
2,268 
hi
can anyone tell me how could one go about to prove
x* (delta)' ~ delta
where delta is the dirac delta...

Sep807 02:33 PM
Hurkyl

11 
1,326 
General Info.
A Mathematician's Apology is a 1940 essay by British mathematician G. H. Hardy. It concerns the...

Sep807 07:05 AM
AlephZero

3 
2,787 
I'm looking for a particular (actually, there are probably several) of two numbers that are "extremely close...

Sep807 06:13 AM
Gib Z

13 
1,838 
Dear all valuable experts,
I'm looking for a free based maths graph plotting software which could display a sketch...

Sep807 02:14 AM
rela

3 
1,304 
for example...is there some software that will let me do all my calculations mod 2 or something? free software would...

Sep707 06:25 PM
matt grime

3 
1,185 
There are SIN and SINH. The first one is familiar as SINUS on calculus (or trigonometry), but, I don’t know what SINH...

Sep707 02:16 PM
HallsofIvy

6 
15,794 
hey i know the basics about complex numbers
like: 5*i^7 = 5*i^3 = 5 * i = 5i = ( pi/2, 5)
but now :
how...

Sep707 02:09 PM
HallsofIvy

10 
1,896 
This is for a PnP RPG I am creating... I've looked around for places on the internet, but haven't really found...

Sep707 10:22 AM
CRGreathouse

18 
2,488 
hello
commonly we have:
\int^t_0 \ dx=M
"M" is a specific number (the result of integal)
my question:
having...

Sep707 06:18 AM
HallsofIvy

4 
2,308 
I've found a new way for finding the circumference of a circle by using a visual perspective ,an angle of 18 degrees,...

Sep607 05:43 PM
philin good

3 
5,099 
Ok so the problem:
2 trains are 100 miles apart traveling towards each other on the same track. Each train tavels...

Sep607 01:50 PM
JonF

8 
9,159 
I think I have returned all my math back to teachers without any refund.
y=f(x);
h=xbxa, which is very small. ...

Sep607 01:48 PM
JonF

5 
7,975 
For the most recent post in PF, which is most likely: few or no replies, or many replies? Is there a distribution of...

Sep607 08:09 AM
cristo

2 
1,271 
Hello friends.
If anybody of you are interested in my theory of planar angles and trimetry, you can see de enclosed...

Sep607 06:45 AM
ferman

0 
1,594 
Does anyone can solve the following equation
x^2 – x < 0
Here is the solutions of mine:
x^2 – x < 0
x(x – 1)...

Sep607 06:43 AM
HallsofIvy

2 
1,373 
I need samples of parametric equations:
x=Fx(t);
y=Fy(t);
the samples must be useful or famous in math, physics...

Sep607 04:36 AM
xyz3003

2 
1,360 
I currently attend a community college.
For several semesters I did poorlyfailed one class and dropped out of a...

Sep507 11:06 PM
mathwonk

6 
6,104 
I am confused myself, so I post the Q.
when we talk about "definite integral of area" in rectangular or polar...

Sep507 09:35 PM
xyz3003

0 
2,893 
Hello, was wondering if someone could help me with a little vector maths problem please.
What I need to find is the...

Sep507 07:18 PM
ice109

3 
2,750 
Hi again everyone…
I have 3 questions:
1) What is the difference between INVERSE and RECIPROCAL?
2) Does...

Sep507 11:48 AM
HallsofIvy

2 
1,177 
n = (28)^3
which is greater:
the units digit of n
OR
4?

Sep507 10:05 AM
uart

15 
2,652 
Disregard this, Sorry i posted a hw question by accident.

Sep407 08:02 PM
Lemm

0 
1,297 
I've been reading some books on theoretical physics lately, namely stuff by Michio Kaku.
I am heading to college in...

Sep407 05:33 PM
Dragonfall

3 
1,416 
So I decided to buy the book The Elements because i couldn't pass the offer up(for $10, can you believe that?) and...

Sep307 03:17 PM
mathwonk

4 
2,361 
i dont understand the point of \hat{\theta} if a vector is completely described by \textbf{r}=r \hat{\textbf{r}}
...

Sep307 12:56 PM
ice109

4 
4,142 
Hello friends,
I am studying in 10th class. Actually I have a question and I’m unable to solve this question. My...

Sep307 12:31 PM
ryan_276

3 
1,033 
I wanted to know , if x(n) has DTFT X(e^jw)
then can we define Y(e^jw) in terms of X(e^jw)?
where Y(e^jw)is DTFT...

Sep307 03:43 AM
ratn_kumbh

1 
1,489 
I understand that infinity  X = infinity.
However, what I don't understand is this. If I have: infinity  1 =...

Sep207 10:07 PM
Hurkyl

4 
4,823 
Another vent of frustration:
I hereby nominate the three worst offences committed in maths textbooks as
0....

Sep207 08:31 PM
PowerIso

38 
5,011 
Hello everyone,
I use a TI83 Plus and I'd like to know if there is a quick way to convert an angle from radian to...

Sep207 06:10 AM
HallsofIvy

5 
38,725 
norm is defined to be the length of the vector and we put we denote it by a.
However, modulus a also means...

Aug3107 11:19 AM
Chris Hillman

6 
5,223 