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

Feb2313 09:23 AM
micromass

1 
37,829 
I've been having a little "problem" with the concept of equivalent mathematical statements. As far as I can tell,...

Jul1004 01:15 PM
Galileo

3 
6,519 
I'm trying to find the papers where a rather dramatic result on billiard systems was proved: for 'typical'...

Nov2108 05:47 PM
Doodle Bob

1 
972 
*Note: I think questions 24 are erroneous?
1) There does NOT exist any x \in \mathbb{R} such that x \in \left(...

Sep1005 10:40 AM
hypermorphism

6 
1,812 
given that a=(6.0+/0.1) and b=(17.5+/0.3)
what is 2a^2 + b^2
i'm having so much trouble with this
i think we...

Sep2007 12:14 PM
Diffy

6 
2,960 
I think this is probably the right place to put it, didn't really fit anywhere else.
I've got the joyless task of...

Apr2012 01:21 PM
Fluorescent

0 
1,141 
Suppose I have some measures of certain physical magnitude "I" between the range x=x1 and x=x2.
I have for each x...

Oct2203 01:55 PM
HallsofIvy

1 
2,540 
Hello yall im new here. Im a first year student in engineering.
I'm writing up a lab now and im supposed to be...

Sep1210 12:55 PM
OpticalSuit

2 
1,148 
Hello,
I have a question about error detection.
Senario:
One person can see two coins. Each coin could be...

Oct703 02:28 PM
wubie

1 
1,542 
Hello!
don t understant the question.
Calculate the error function for f(x)=tan(x), for linear, quadratic and...

Nov211 09:58 AM
jackmell

5 
1,356 
I would like to know how the following integral for the error function gets derived (found by following the link):
...

Nov211 04:04 AM
JJacquelin

7 
1,661 
For a matrix ,
Is there anyway to calculate the Error function of matrix or Erf ?
Any possible solution to...

Mar2011 02:18 PM
Stephen Tashi

5 
1,342 
On project Eureka the following problem was posted:
You and a friend like running, but your friend is much faster...

May1712 06:28 PM
Bagbo

3 
884 
I have an equation that I've been trying to solve. I manipulated it until I had a=f(d) and then did by best to put it...

Jul2812 08:06 PM
haruspex

4 
993 
Hi i found this "error" in my text book in series.
...

Mar1107 06:56 AM
matt grime

12 
1,820 
A highway and a train track run parallel to each other. At 5:00 a train crosses a river. Fifteen minutes later, a car,...

Jan1908 09:07 PM
Holocene

4 
1,649 
could find input index file
that's one error that shows up
I have no idea how to fix it.

Apr907 09:36 AM
Hootenanny

3 
2,852 
http://img.photobucket.com/albums/v224/TurbineSpeed/Picture402884.jpg
Isn't it true that the "y" does NOT belong...

Nov2207 11:33 PM
stewartcs

3 
1,557 
Hi,
For an experiment I have a value for the error in time t (s) to be +0.13s but I'm having difficulty getting...

Apr511 01:10 AM
kwah

2 
2,506 
In chapter 5 of Young/Freedman's University Physics, 13th ed., Eq. 5.10 is given as:
##v_{y} = v_{t}(1 ...

Aug1012 04:30 PM
SiennaTheGr8

8 
1,125 
Always the easy things we forget...
I know how errors propogate through multiplication or division when every term...

Sep2804 06:46 AM
HallsofIvy

1 
2,470 
Recently I came across an example for working out error propagation, and I'm having trouble following the steps:
A...

Jan2010 10:57 AM
elibj123

3 
1,880 
I am doing a calculation involving taking three or more temperature measurements and then plotting them against...

Jul1409 07:38 PM
refrigerator

2 
2,569 
Hi,
I am trying to represent my data in log2 form rather than "fold change" and I am embarrassed to say I can't...

Jun609 09:10 PM
dipluso

1 
4,313 
Hi,
I've been trying to reproduce the output of an analytical machine here at work by doing the calculation...

Mar2408 08:38 PM
dipluso

3 
1,253 
Not sure if this is the right section to post this..
I have 3 measurements and was trying to take the average of the...

Oct2011 05:54 PM
davidp92

0 
562 
if given two points each with different x and y coordinates, what is the best way to define the error between these...

Jul1207 01:24 PM
matt grime

4 
980 
Anyone attended maths seminars where the speaker made a genuine mistake as opposed to a typo or slip of the tongue?
...

Nov2508 02:07 AM
tgt

0 
1,138 
Hi everyone,
Let's say a simulation outputs a range of estimates with various accuracy level, ranging from 30% to...

Apr2912 07:18 PM
lost&found

0 
1,431 
I have two triangles in 3d. I need to calculate transformation matrix(3X3) between two triangles in 3D.
1)How can I...

Jun1512 08:16 PM
haruspex

3 
1,616 
Hey guys,
I was posed an interesting problem which relates to upsizing quantum physics, that boils down to a math...

Sep1411 03:48 AM
lurflurf

1 
868 
I made a cannon for physics in school, and now I'm having problems proving its actual muzzle velocity mathematically,...

May508 01:53 PM
grille

0 
2,448 
I am at a school where you have to work at your own pace and if you don't finish, you have to continue the course next...

Aug1103 06:33 AM
plus

2 
13,275 
How can I estimate the value of sqrt. of a particular no. which is not a perfect square(e.g. 125) without using the...

Jan1305 10:03 PM
BobG

11 
3,705 
I wanted to know if there are any rules for interpreting mathematical expressions. If we succeed in interpreting a...

Dec1011 02:07 PM
micromass

1 
774 
John Nash proved you have to think not only about yourself.
Is possible to prove that people should be ethical...

Dec1904 10:55 PM
Bob3141592

3 
3,193 
Hi All,
I'm hoping I can find some help to solve a puzzle that came up last night with friends. I thought I could...

Mar2212 11:19 PM
rcgldr

3 
2,308 
please suggest what books should I do to strong my concepts in eucleodian geometry (ELEMENTARY & PRE COLLEGE LEVEL)?...

May3112 09:59 PM
Vargo

10 
1,765 
I am taking the Euclid contest and I have to say, from what I've seen the last two numbers or so tend to be impossibly...

Mar2507 11:25 AM
Ilsa

6 
4,792 
I'm having trouble understanding why Euclids Elements is so scarce in introductory Geometry classes. I don't remember...

Jun1608 09:27 PM
LukeD

2 
1,462 
Near the end of Euclid's proof he says that if you multiply all our known primes from 2 to Pn and then add 1 to it,...

May2609 06:20 PM
qntty

7 
1,908 