content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Nonlinearity enhancement in finite coupled-resonator slow-light waveguides
« journal navigation
Nonlinearity enhancement in finite coupled-resonator slow-light waveguides
Optics Express, Vol. 12, Issue 15, pp. 3353-3366 (2004)
http://dx.doi.org/10.1364/OPEX.12.003353
Abstract
In this paper, we derive the exact disp... | 4 | [
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The Human Limits
How Many Objects Can Be Juggled
... | 4 | [
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0... | 101 | 101 | |
Simple decimal precision problem
Hi
I am implementing the Gauss-Legendre algorithm for approximating pi in common lisp. How do I use a long float? I have not been using lisp for very long and it automatically uses float and prints
somewhere around 10-14 digits, but I want to generate and display many more digits than ... | 4 | [
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Math Help
Last edited by General; February 10th 2010 at 09:22 PM.
Run the online derivative calculator: webMathematica Explorations: Step-by-Step Derivatives Derivative of: x*Tan[x]^(1/2) With respect to: x Gives: $\sqrt{\tan(x)} + \frac{x \sec^2(x)}{2\sqrt{\tan
(x)}}$ This is valid for $x > 0$ For $x < 0$, you have ... | 5 | [
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Integrating by parts
April 6th 2011, 08:12 AM #1
Newbie
Joined
Mar 2011
Posts
14
Integrating by parts
Solve the differential equations specified using an integrating factor.
Solve the initial-value problem
dy/dt = 1/(t+1)y + 4t^2 + 4t, y(1) = 10
Already,
Already,
so dy/dt = 1/(t+1)... | 5 | [
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Eigenvalues
January 3rd 2012, 06:39 AM #2
MHF Contributor
January 3rd 2012, 01:02 AM #1
Newbie
Re: Eigenvalues
You have no idea how to solve this? Even if you are a beginner, if you are given a problem like this, you should know how to find eigenvalues- at least the definition of "eigenvalue".
A number, $... | 4 | [
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Nonlinear regression
Stata’s nl command fits an arbitrary function by least squares. That is, given
y[j] = f(x[j], b) + u[j]
nl finds b to minimize Σ[j] (u[j]^2). (nl can also obtain weighted least squares estimates.) You need only supply the function f(); you do not need to supply the derivatives.
nl provides thre... | 5 | [
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recursive definitions
November 23rd 2009, 09:31 PM #1
Junior Member
Joined
Nov 2009
Posts
73
recursive definitions
For n>= 1 let a(sub n) be the number of ways in which 2n people can be paired to do n simulataneous projects. Find a recurrence relation for a(sub n)
$a_{n+1}=a_n+2n(2n-1)a_{n-1}$
a... | 5 | [
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Congruence proof
November 9th 2009, 06:52 PM
comssa
Congruence proof
Show that if $p\mid\phi(m)$ and $p$ doesn't divide $m$ then there is at least one prime
factor $q$ of $m$ such that $q \equiv 1 (\mbox{mod p})$.
November 9th 2009, 08:10 PM
tonio
Quote:
Hint: $If\,\,m=p_i^{a_1}\cdot...\cdot p_... | 5 | [
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If x and y are integers greater than 1, is x a multiple of
Author Message
TAGS:
If x and y are integers greater than 1, is x a multiple of [#permalink] 22 Jul 2007, 20:18
... | 4 | [
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Homework Help
Posted by Avinash on Wednesday, June 26, 2013 at 9:54am.
MR. x is invested a certain amount in debit and equity funds the ratio of 4:5 respectively,At the end of one year ,he earned a total dividend of 30% on his investment. After one year he reinvested
the amount includeing dividend in the ratio 6:7 in ... | 4 | [
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HELLP!! calculus
Posted by Kay on Wednesday, November 23, 2011 at 5:35pm.
A piece of wire 25 m long is cut into two pieces. One piece is bent into a square and the other is bent into a circle.
(a) How much of the wire should go to the square to maximize the total area enclosed by both figures?
(b) how much of the wi... | 5 | [
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Algebra, Problems For Fun (36)
July 28th 2009, 11:04 PM
NonCommAlg
Algebra, Problems For Fun (36)
Definition: An element $r$ in a ring $R$ is called central if $r$ is in the center of $R,$ i.e. $rs=sr,$ for all $s \in R.$
1) Suppose $R$ is a ring in which $x^2=0 \Longrightarrow x=0.$ Let $e \in R$ be an id... | 5 | [
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How to calculate wetted surface area?
April 10th 2009, 06:39 PM #1
Newbie
Joined
Jun 2008
Posts
16
How to calculate wetted surface area?
A resevoir has the shape of an inverted cone with altitude 6m and diameter at the top 18m. Water runs in at $3 m^3/s$. At the instant the maximum depth is 4m, determine... | 5 | [
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conditional probability
Posted by Tifini on Tuesday, July 17, 2012 at 4:43pm.
Among a group of people, 10% are from NYC and 90% are not. All people from NYC are under 18 years old, and 60% of those not from NYC are also under 18 years old. One person is chosen at random, and
he or she is under 18. What is the probabil... | 5 | [
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Challenging Question - help a brother
December 9th 2006, 06:39 AM #1
Newbie
Joined
Dec 2006
Posts
4
Challenging Question - help a brother
Hello,
thanks in advance for anyone who can help me.
this question relates to linear quadratic systems
the question is:
Generalize your results for... | 4 | [
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Dimensions, dimensional homogeneity, and independent dimensions
Next: Examples Up: Dimensional Analysis Previous: The SI system of
Returning to the discussion above, recall that if the units of length are changed by a factor of L, and the units of time are changed by a factor of T , then the units of velocity chan... | 5 | [
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Re: st: Difference in Difference for Proportions
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: st: Difference in Difference for Proportions
From Jeph Herrin <junk@spandrel.net>
To statalist@hsphsun2.harvard.edu
Subject Re: st: Difference in Difference for Proportions
Date T... | 4 | [
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Homework Help
Posted by Mackenzie on Tuesday, December 4, 2012 at 11:46am.
Find the parametric equations for the line of intersection of the planes x+y+z=3 and x-y+2z=2
I took the cross product of the 2 equations and got 3i-j-2k
I then set z=0 and got x=5/2 and y=1/2.
I got:
x=5/2 +3t
y=1/2-t
z=-2t
However, the... | 4 | [
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KANA-EE-08/01/02-BIPOLARDESIGN0001
KANA-EE-08/01/02-BIPOLARDESIGN0002
Analogue Design
Kevin Aylward B.Sc.
... | 5 | [
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... | 119 | 119 | |
y''=sin(2x) find and experssion
http://quicklatex.com/cache3/ql_4cc2...9b4c853_l3.png get confused with the wordy ones.......do I integrate this twice, then add coordinate values ? many thanks
You do integrate twice. In the process of so doing, you should obtain two arbitrary constants of integration. If you plug in t... | 5 | [
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(cos^2x-sin^2x)/cos^2x+sinxcosx=1-tanx
April 6th 2009, 06:57 AM #1
Senior Member
Joined
Nov 2008
Posts
425
(cos^2x-sin^2x)/cos^2x+sinxcosx=1-tanx
Can someone PLEASEEEEEE help me prove this trig identity.
I did it down to where I have
LS:
sinx/cosx
RS:
-sinx
I am not sure where ... | 4 | [
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Homework Help
Posted by chris on Tuesday, July 10, 2007 at 5:43pm.
what is the factorial of a negative number?
The factorial function has singularities at the negative integers.
You can see this as follows. For integers we define:
(n+1)! = (n+1)n!
and we put 0! = 1
So, from 0! you can compute 1! and from that you... | 4 | [
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Show that ....
December 15th 2010, 07:41 AM
razemsoft21
Show that ....
ABC is a triangle with sides a,b and c. show that :
if $a^2-b^2=bc$ then A=2B
I try to use the cosine law, but no result
December 15th 2010, 06:37 PM
tonio
Quote:
In any isosceles straight-angle triangle with hypotenus... | 5 | [
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atan2 - Java-Gaming.org
Since trig and inverse trig come up time and time again, I spent a few minutes tossing together a reasonable atan2 approximation. Making good approximations require more work that I'm willing to
commit to this function. (Because you really shouldn't need to call this very much: says the old grum... | 4 | [
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Bounded partial derivatives implies continuity.
September 20th 2010, 05:40 PM
Pinkk
Bounded partial derivatives implies continuity.
Theorem: If $f$ is a function defined on an open set $S \subset \mathbb{R}^{n}$ and the partial derivatives exist and are bounded on $S$, then $f$ is continuous on $S$.
So I so... | 4 | [
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... | 125 | 125 | |
2 simple problems concerning implicit differentiation
November 14th 2009, 01:33 PM #1
Member
Joined
Oct 2009
Posts
229
2 simple problems concerning implicit differentiation
1) Find dy/dx for $4y^2 - xy = 2$
The given answer is; $y / (8y - x)$ but I don't understand how to get that. My procedure was;... | 5 | [
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How to find the difference between angles of two complex numbers
May 21st 2013, 06:23 AM
ashokec
How to find the difference between angles of two complex numbers
Hi
I have two vectors represented as complex numbers and need to calculate angle between in most efficient way.
This is for implementing in C.
... | 4 | [
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... | 127 | 127 | |
Homework Help
Posted by jason on Thursday, October 17, 2013 at 7:56pm.
Find the inverse of each of these functions
a)f(x)=x/x+2
b)f(x)=2x/5-x
c)f(x)=3x/2x+1
• math - Anonymous, Thursday, October 17, 2013 at 10:01pm
x =2y/5 -y
5x = 2y -5y
5x = -3y
F(x) = -5x/3
• correction - math - Reiny, Frid... | 4 | [
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Wrong answers on test, need help
July 19th 2009, 09:33 PM
pinnacle2009
Wrong answers on test, need help
Here are a few problems I missed on the test. The professor doesn't show where you missed the problem or anything. Would like to know how to work these:
1) Solve for x: $tan(pi(x)/2)=0$
2) Solve for ... | 4 | [
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0.0224609375,
0.0172119140625,
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0.06884765625,
0.005340576171875,
-0.0289306640625,
-0.0126953125,
-0.030029296875,
-0.01... | 129 | 129 | |
Confidence Intervals
sample mean
The level C of a confidence interval gives the probability that the interval produced by the method employed includes the true value of the parameter
Example
Suppose a student measuring the boiling temperature of a certain liquid observes the readings (in degrees Celsius) 102.5, 101.... | 5 | [
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0.007415771484375,... | 130 | 130 | |
a partial differentiation problem
January 23rd 2010, 01:39 AM #1
Newbie
Joined
Jan 2010
Posts
6
Hi guys, i ve got a problem and i've never seen this type of question before..could u help me out?
thank you
That is in the form of a solution to a first order PDE with constant coefficients:
$a ... | 5 | [
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0.0125732421875,
-0.0546875,
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Homework Help
Posted by Gunjan kumar on Sunday, January 23, 2011 at 7:29am.
Show the two lines (x/2-1/2)=(y/3-2/3)=(z/4-3/4) and (x/5-4/5)=z intersect.find the point of intersection of these lines
• Math - Reiny, Sunday, January 23, 2011 at 9:03am
subbing the 2nd into the first:
x/2 - 1/2 = z/4 - 3/4
x... | 4 | [
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-0.0771484375,
-0... | 132 | 132 | |
Equation problem and others...
January 13th 2010, 02:46 AM #1
Banned
Joined
Oct 2009
Posts
39
Thanks
1
Equation problem and others...
Could any1 help me a bit with this equation ?
1) X1+X2+X3=11 , So how many are the solutions?
2) We 've got these letters -> A,B,C,D,E,F,G,H , how many permut... | 4 | [
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-0.1103... | 133 | 133 | |
Polynomial Func. and Eq.'s
November 9th 2007, 06:53 AM #1
Junior Member
Joined
Sep 2007
Posts
60
Polynomial Func. and Eq.'s
If anyone could provide the answer so i can compare with mine, or tell me whats wrong with my answer that would be great.
1. Solve Algebraically
A) $2x^2+5x-63>0$
My ... | 4 | [
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-0... | 134 | 134 | |
Sizing Science: The Geometry of M&Ms
Key concepts
Geometry
Mathematics
Shapes
Dimensions
Volume
Introduction
Has an adult ever caught you munching on candy and asked, "How much candy have you eaten?" Instead of saying, "I don't know," and possibly receiving a scolding, wouldn't you rather respond, "I ate
precisely 10.... | 4 | [
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0.046630859375,
0.09667968... | 135 | 135 | |
Math - potential zero
Posted by CheezyReezy on Wednesday, June 1, 2011 at 10:01pm.
List all possible (or potential) rational zeros for the polynomial below. Find all real zeros of the polynomial below and factor completely over the real numbers. Please show all of your work.
f(x) = x^4 - 7x^3 -3x^2 + 19x + 14
Help
... | 4 | [
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0... | 136 | 136 | |
RE: st: panel regression analysis interpretation
Notice: On March 31, it was announced that Statalist is moving from an email list to a forum. The old list will shut down on April 23, and its replacement, statalist.org is already up and running.
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index... | 4 | [
-0.09375,
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-0.077148437... | 137 | 137 | |
Variation of Parameters
April 18th 2009, 03:01 PM #1
Newbie
Joined
Nov 2006
Posts
13
I have a test coming up involving variation of parameters and I am practicing. I got stuck on this one, I know it should just be algebra but now I'm lost.
Using the system of equations:
U1'(y1)+U2'(y2) = 0
U... | 4 | [
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0.015625,
... | 138 | 138 | |
algebra homework
Posted by Ang on Friday, October 26, 2007 at 10:38pm.
please check my answers.
Solve the logarithmic equation. Be sure to reject any value that is not in the domain of the original logarithmic expressions. Give the exact answer.
ln sqrt x+6 = 9 i got {e^9-6}
log (x + 4) = log (5x - 5)
i got: 9/4
... | 4 | [
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0.0286865234375,
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0.041748046... | 139 | 139 | |
Homework Help
Posted by Helpless on Wednesday, May 23, 2007 at 9:04am.
Please help me I am terrible at math, and this is my last class before graduation..
1. Find the value of X... x/6-x/8=1
2. Find the value of X...x/x-2-x+1/x=8/x^2-2x
3. Find the value of X...5/x+6+2/x^2+7x+6=3/X+1
4.Find the value of X...2/5=x-... | 4 | [
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0.0517578125,
-0.0461425781... | 140 | 140 | |
projectile launch velocities, given a position
May 5th 2008, 03:32 AM
smitzer
projectile launch velocities, given a position
struggling with this problem:
using very simple projectile rules (no air resistance ect) and only gravity acting on the object, is it possible to:
with a known: gravity, launch mag... | 4 | [
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0.036865234375,
0.029296875,
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0.036865234375,
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-0.01806640625,
0.10449... | 141 | 141 | |
Simultaneous equations
January 6th 2010, 08:52 PM #1
Junior Member
Joined
Feb 2009
Posts
59
Simultaneous equations
Solve the following pairs of simultaneous equations for x and y:
(a + b)x + cy = bc
(b + c)y + ax = -ab
unsure how to start any help would be greatful!
Also write s in term... | 4 | [
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0.0595703125,
-0.05224609375,
-0.00... | 142 | 142 | |
Homework Help
Posted by John on Tuesday, October 30, 2007 at 1:18pm.
Ok I got two I need help with :
1. Factor Completely
7x^2 + 49x + 42
I get 7x^2 + 7x + 42x + 42
then 7x(x+1) but the right side is confusing me. I know it should be (x+6).
So the answer is 7x(x+1)(x+6) But I get 7x(x+1) 7(6x+6). What am I doing ... | 4 | [
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0.068359375,
0.0260009765625,
0.083984375,
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0.0306396484375,
-0.12... | 143 | 143 | |
Is it possible to make 3d Bezier curves using the API?
Posted Sunday, 8 July, 2012 - 20:25 by overgroove in
The API has the handy BezierCurve classes, however, the structures are all Vector2's. Is there a way to make 3-dimensional Bezier curves? That seems like it would be more generally useful than the
2-dimensional ... | 4 | [
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0.0390625,
0.0115966796875,
-0.0419921875,
0.090332031... | 144 | 144 | |
Empirical Moments problem
April 6th 2008, 12:17 PM #1
Empirical Moments problem
Hello again, I hope I'm not getting on peoples nerves yet with my constant question. :/
I have the following problem:
Given the table:
x 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12
f 1, 7, 11, 16, 8, 4, 5, 2, 1, 0, 0, 1
... | 4 | [
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0.002227783203125,
-0.07177734375,
-0.08837890625,
0.036865234375,
-0.0230712890625,... | 145 | 145 | |
internal semi-direct product with homomorphism
June 2nd 2010, 08:43 AM
aabsdr
internal semi-direct product with homomorphism
Let H be a cyclic group under addition. Let q=internal semidirect product between Zn and Z2. Let f: H to H be the inversion automorphism defined byf(x)=-x. Define a: Z2 to Aut(H) to be the... | 4 | [
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0.052978515625,
-0.07763671875,
-0.03857... | 146 | 146 | |
2.4 Some Consequences of the Field Axioms.
Next: 2.5 Subtraction and Division Up: 2. Fields Previous: 2.3 The Field Axioms   Index
2.59 Theorem (Cancellation laws.) Let (2.60) and (2.61) are called cancellation laws for addition, and (2.62) and (2.63) are called cancellation laws for multiplication.
Proof: ... | 5 | [
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-0.06103515625,
0.1044921875,
-0.07... | 147 | 147 | |
Math I'm so confused
Posted by Josh on Wednesday, March 30, 2011 at 11:38am.
Find the absolute maximum and absolute minimum values, if any, of the function. (If an answer does not exist, enter DNE.)
f(x) = x2 − x − 5 on [0, 5]
Come someone please show me how to do these problems? I'm lost
• Math I'm so confused -... | 4 | [
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-0.12451171875,
-0.08... | 148 | 148 | |
Calculuss--Optimization
Posted by Maria on Monday, November 21, 2011 at 8:47pm.
At t=0, ship A is 12 miles due north of ship B. Ship A travels 12 miles/hour due south, while ship B travels 8 miles/hour due east.
a. Write a function for the distance between the two ships.
b. At what time are the two ships closest?
... | 5 | [
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-0.0478515625,
0.08154296875,
-0.000341415405273437... | 149 | 149 | |
Homework Help
Posted by Morgan on Saturday, November 5, 2011 at 2:09am.
15. [1pt] A thin hoop of radius r = 0.59 m and mass M = 9.2 kg rolls without slipping across a horizontal floor with a velocity v = 3.3 m/s. It then rolls up an incline with an angle of inclination θ
= 31°. What is the maximum height h reached by ... | 4 | [
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0.01123046875,
... | 150 | 150 | |
Homework Help
Posted by Stumped again on Monday, December 5, 2011 at 12:53pm.
okay heres the question and the answer I have, but Im not sure its right because the values seem way too high to interpet what it means..:
Data: 63.4,65.0,64.4,63.3,54.8,64.5,60.8,49.1,51.0
"Assume that these observations on SRS from the l... | 5 | [
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-0.03271484375,
-0.05810546875... | 151 | 151 | |
Homework Help
Posted by Sam on Wednesday, December 5, 2007 at 3:16am.
1) Find the derivative with respect to x of
Integral from 1 to X^3 of sqrt( 1 + t²) dt
I got sqrt( 1 + X^6) * 3x². Is that right?
2) Integral from 0 to pi/2 of
Xcos(X²)dx
• Calculus - Reiny, Wednesday, December 5, 2007 at 8:38am
For thes... | 5 | [
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0.021240234375,
-0.0795898437... | 152 | 152 | |
st: RE: RE: Creating a distribution from moments
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]
st: RE: RE: Creating a distribution from moments
From "Feiveson, Alan H. \(JSC-SK311\)" <alan.h.feiveson@nasa.gov>
To <statalist@hsphsun2.harvard.edu>
Subject st: RE: RE: Creating a dist... | 4 | [
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0.033935546875,
-0.0013275146484375,
-0.049560546875,
0.0361328125,
... | 153 | 153 | |
Find the characteristic polynomial of an arbitrary-sized matrix
November 5th 2009, 06:45 PM
Last_Singularity
Find the characteristic polynomial of an arbitrary-sized matrix
Question: Let $A \in M_{n \times n}(R)$ be the matrix defined by $A_{ij} = 1$ for all $i,j$. Find the characteristic polynomial of $A$.
... | 5 | [
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-0.01104736328125,
-0.0096435546875,
0.0732421875,
0.04150390625,
0.041748046875,
0.05322265625,
-0.0269775390625,
-0.0751953125,
0.0118408203125,
-0.0205078125,
-0.0267333984... | 154 | 154 | |
Identifying Inflection Points
January 22nd 2008, 08:21 PM #1
Member
Joined
Oct 2007
Posts
178
Identifying Inflection Points
The x coordinates of the points of inflection of the graph of $y= x^5-5x^4=3x+7$ are...
A 0,
B 1,
C 3,
D 0 and 3,
E 0 and 1
$y''=20x^3-60x^2$
Simplify.... | 4 | [
-0.0235595703125,
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-0.032958984375,
0.028564453125,
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0.0400390625,
0.0537109375,
0.038330078125,
0.041015625,
-0.0751953125,
-0.0524902... | 155 | 155 | |
Accurately computing running variance
The most direct way of computing sample variance or standard deviation can have severe numerical problems. Mathematically, sample variance can be computed as follows.
The most obvious way to compute variance then would be to have two sums: one to accumulate the sum of the x's and... | 5 | [
0.039306640625,
0.043212890625,
0.044921875,
0.007293701171875,
-0.04638671875,
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0.0634765625,
0.09375,
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0.06884765625,
0.0673828125,
0.0257... | 156 | 156 | |
Homework Help
Posted by Anonymous on Tuesday, October 16, 2012 at 11:03pm.
Rewrite the expression as an algebraic expresion in x:
tan(sin−1x)=
• math - Anonymous, Tuesday, October 16, 2012 at 11:04pm
sorry I meant tan(sin^-1 x)=
• math - Reiny, Wednesday, October 17, 2012 at 8:41am
sin^-1 x is angle i... | 4 | [
-0.0625,
0.07421875,
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-0.088... | 157 | 157 | |
Exploring mathematics elementary algebra
Posted by Joe Mhar Plaza on Thursday, January 6, 2011 at 10:34pm.
The sum of the of a two-digit number is 15. One third of the number diminished by 12 is 17. Find the number.
• Exploring mathematics elementary algebra - Reiny, Thursday, January 6, 2011 at 10:52pm
Did yo... | 4 | [
-0.08056640625,
0.04833984375,
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0.039794... | 158 | 158 | |
Matlab exercise
March 21st 2009, 02:59 PM #1
Matlab exercise
I am clueless on how to do this exercise I was assigned in my calculus class (even my professor isn't that knowledgeable about MATLAB):
Using the parametric representation $x = cosh(t)$ , $y = sinh(t)$ , plot the curve $1= x^{2} - y^{2}$. Include p... | 4 | [
0.06201171875,
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-0.0279541015625,
... | 159 | 159 | |
prime and atom
October 30th 2009, 09:07 AM #1
Member
Joined
Oct 2008
Posts
83
prime and atom
Suppose that a,b in R, where R is an integral domainand a~b.
Show that: (i) a is prime if and only if b is prime
(ii) a is an atom if and only if b is an atom
how do you prove it?
Thank you very ... | 5 | [
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-0.014404296... | 160 | 160 | |
Algebra 2 help please :)
Posted by Robert on Tuesday, November 27, 2012 at 12:57pm.
What is a cubic polynomial function in standard form with zeros 1, –2, and 2?
Use synthetic division to find P(3) for P(x) = x^4 – 6x^3 – 4x^2 – 6x – 2.
Divide 3x^3 + 3x^2 + 2x – 2 by x + 3 using long division.
Divide using syntheti... | 4 | [
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-0.0703125,
-0.0159912... | 161 | 161 | |
Clock
Part I: what is the angle between the minute hand and the hour hand at 3:15 on an analog clock? no, its not 0.
Part II: how often does the minute hand pass the hour hand on an analog clock?
Solution
part I: 12 hours on the clock make 360 deg. so one hour is 30 deg. the hour hand will be directly on the 3 when ... | 4 | [
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0.03076171875,
-... | 162 | 162 | |
Metric of a product
September 11th 2009, 03:43 PM #1
Super Member
Joined
Mar 2006
Posts
705
Thanks
2
Metric of a product
Suppose that $(X, \rho ),(Y, \gamma )$ are metric spaces, define $( X \times Y , \phi )$ with $\phi ((x_1,y_1),(x_2,y_2)) = \sqrt { ( \rho (x_1, x_2))^2+ ( \gamma (y_1,y_2))^2 }$
... | 4 | [
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math & finance
Posted by Thara on Wednesday, July 29, 2009 at 10:29pm.
A bank offers a rate of 5.3% compounded semi-annually on its four year GICs(Guaranteed Investment Certificates). What monthly and annually compounded rates should it quote in order to have the same
effective interest rate at all three nominal rates... | 5 | [
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-0.105957031... | 164 | 164 | |
Simultaeous equation with infinite solutions
September 17th 2010, 06:48 AM
bobred
Simultaeous equation with infinite solutions
Hi
How would I be able to find the value of $a$ that would give the equations an infinite number of solutions
$x-4y+z=14$
$-4x-3y+3z=8$
$17x-30y+az=110$
Thanks
Se... | 5 | [
-0.12890625,
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-0.00012302398681640625,
-0.068359375... | 165 | 165 | |
st: Simultaneous Tobit Models with ml
[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]
st: Simultaneous Tobit Models with ml
From "Olivier Paradis-Beland" <obeland@ecn.ulaval.ca>
To <statalist@hsphsun2.harvard.edu>
Subject st: Simultaneous Tobit Models with ml
Date Thu, 27 Nov 20... | 4 | [
0.0166015625,
-0.03955078125,
-0.01556396484375,
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-0.... | 166 | 166 | |
Homework Help
Posted by April on Thursday, March 26, 2009 at 3:40pm.
The average price for new mobile homes is known to be distributed with a standard deviation of 350. if a random sample of 49 homes resulted in a sample mean of 38500, obtain a 90% confidence interval
on the population mean.
• statistics - MathGuru... | 4 | [
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0.020751953125,
-0.0620117... | 167 | 167 | |
Suppose E[Y|X]=1. Show Cov(Y,X)=0.?
Suppose E[Y|X]=1. Show Cov(Y,X)=0.? Please help!! EDIT: GOT IT, nevermind :)
just for fun, since the OP has the answer anyway: first: $E(Y) = E_xE(Y|X) = E_x(1) = 1$ and $E(XY)=E_x(E(XY|X)) = E_x(E(X|X)E(Y|X)) = E_x(X \cdot 1)$ $= \sum x P(X=x)$ $= E(X)$ Then $Cov(X,Y) = E
(XY) - E(... | 5 | [
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-... | 168 | 168 | |
SparkNotes: SAT Physics: Newton’s Law of Universal Gravitation
11.1 Uniform Circular Motion 11.5 Kepler’s Laws
11.2 Newton’s Law of Universal Gravitation 11.6 Key Formulas
11.3 Gravitational Potential Energy 11.7 Practice Questions
11.4 Weightlessness 11.8 Explanation... | 4 | [
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-0.134765625,
-0.021606445... | 169 | 169 | |
Math Investigations II
Posted by Cody on Saturday, October 22, 2011 at 2:37pm.
For what value of k will the system be dependent?
x+3y+2z=-4
3x+4y-z=2
3x-y-8z=k
I'm confused as to what exactly it's asking for by a dependent system. I know this is a system with infinite solutions, but I don't know how to find that i... | 4 | [
-0.1279296875,
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0.083984375,
-0.0264892578125,
0.0615234375,
-0.054443359375,
-0.08... | 170 | 170 | |
Homework Help
Posted by Frederique on Sunday, November 19, 2006 at 9:36am.
Note that
pi
lim arctan(x ) = ----
x -> +oo 2
Now evaluate
/ pi \
lim |arctan(x ) - -----| x
x -> +oo \ 2 /
I'm not exactly sure how to attempt it. I have tried h'opital's rule but I don't believe you can use it here. Any help will be g... | 5 | [
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... | 171 | 171 | |
Monkey typing "HAMLET" and Website Password
June 9th 2013, 05:33 PM
divinelogos
Monkey typing "HAMLET" and Website Password
I. Suppose that one monkey presses 10 keys at random. What is the probability that he types the word HAMLET if he is(a)allowed to repeat letters, and (b) not allowed to repeat letters?
... | 4 | [
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-0.0184326171875,
-0.0... | 172 | 172 | |
IVP using Leibniz formula
May 10th 2011, 02:22 PM
morganfor
IVP using Leibniz formula
How does one formulate this integral equation as an initial value problem?
u(t)=1 + integral from 0 to t (s ln (s/t) u(s) ds)
we're supposed to use Leibniz formula but I'm not sure how to apply it. Thanks!
May 10th 2... | 4 | [
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0.040283203125,
-0.07373046875,
-... | 173 | 173 | |
Homework Help
Posted by Amy on Thursday, April 18, 2013 at 8:02pm.
An object is launched upward from the ground with an initial vertical velocity of 40 feet per second. After how many seconds does the object reach a height of 25 feet? I need to use the vertical
motion model. Here is my work so far.
h = -17t^2 + 40t +... | 4 | [
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0.047119140625,
0.0017547... | 174 | 174 | |
Given sinx=4/5, cosy=7/25 find the following.
February 9th 2009, 11:59 PM #1
Junior Member
Joined
Jan 2009
Posts
36
Given sinx=4/5, cosy=7/25 find the following.
Angles x and y are located in the first quadrant such that sinx=4/5, and cosy = 7/25.
a) Determine an exact value of cosx.
b) Determi... | 4 | [
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0.054443359375,
0.0947265625,
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-0.032470703125,
... | 175 | 175 | |
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Topic: SumConvergence still imperfect
Replies: 0
SumC... | 5 | [
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0.015380859375,
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0.0849609375,
-0.057861328125,
0.04... | 176 | 176 | |
Theorem 4.3
Theorem 4.3: Let M be an invertible isometry. If A and B are two points which are on the same side of a line L, then M(A) and M(B) are on the same side of M(L).
Proof: By Theorem 4.2, M(L) will be a line. Suppose M(A) and M(B) are on opposite sides of M(L), then by Theorem 2.8, there is a point X which is ... | 4 | [
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-0.018... | 177 | 177 | |
[SOLVED] algebra in P.M.I
June 8th 2010, 09:22 PM
dunsta
[SOLVED] algebra in P.M.I
I am still having trouble following the simplification of equations in the Induction examples i am studying.
The notes I have use this:
$<br /> [\frac{1}{2}k(k+1)] + (k+1)<br />$
which is simplified to
$<br /> \fr... | 4 | [
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0.03759765625,
0.039794921875,
0.02246093... | 178 | 178 | |
Maximal Ideal, Prime Ideal
September 28th 2008, 10:56 AM #1
Junior Member
Joined
Sep 2008
Posts
48
Maximal Ideal, Prime Ideal
Let K a field, prove:
i) $\langle X,Y\rangle$ is a maximal ideal in $K[X,Y]$
ii) $\langle Y\rangle$ is a prime ideal in $K[X,Y]$ that not is maximal
Thanks!!!
... | 5 | [
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0.08056640625,
-0.003784179687... | 179 | 179 | |
NPV Problem and Solution
>> December 16, 2011
Lexington Auto Parts Co. is considering installation of a *CIM system as part of its implementation of a JIT (Just-In-Time) philosophy. Cathie Rupp, company president, is convinced that the new
system is necessary, but she needs the numbers to convince the board of... | 5 | [
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... | 180 | 180 | |
Consider the functions
Posted by Kayleigh on Wednesday, April 10, 2013 at 12:03pm.
Consider the functions
f(x)= 5x+4/x+3(This is a fraction) and
g(x)= 3x-4/5-x(This is a fraction)
a)Find f(g(x))
b)Find g(f(x))
c)Determine whether the functions f and g are inverses of each other.
• Consider the functions - Stev... | 4 | [
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-0.0255126953125,
... | 181 | 181 | |
Homework Help
Posted by Anonymous on Friday, December 2, 2011 at 8:06am.
a rectangular garden is to be fenced along four sides and in the middle it is to be divided into 2 equal areas.if 300meters of fencing materials is available, find the maximum possible area that can
be fenced.
• math - Reiny, Friday, December ... | 4 | [
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-0.035400390625,
0.0284423828125,
... | 182 | 182 | |
MathGroup Archive: January 2002 [00301]
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Re: Re: parameter restrictions
• To: mathgroup at smc.vnet.net
• Subject: [mg32464] Re: [mg32442] Re: [mg32428] parameter restrictions
• From: BobHanlo... | 4 | [
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Program Generation for H
Generating memory-bandwidth--optimal code for array computations -- typical of PDE solvers and signal processing kernels -- was one of the Shonan Challenge benchmarks. The challenge was submitted
by Takayuki Muranushi, an astrophysicist whose work depends on solving PDEs on truly huge m... | 4 | [
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linear differential equations
May 13th 2008, 07:17 AM #1
Junior Member
Joined
Mar 2008
From
Perth
Posts
26
linear differential equations
show that the differential eqn x^2 * dy/dx -y = 2x^3*e^(-1/x)
is linear, and solve it using the integrating factor method.
I have no idea how to even get s... | 5 | [
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Is there an equivalent of Excel's NORMDIST function in SQL Server 2005?
Posted Monday, August 9, 2010 7:55 AM
Grasshopper Is there an equivalent of Excel's NORMDIST function in SQL Server 2005?
Group: General Forum Members
Last Login: Wednesd... | 5 | [
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Finding the general solution of the D.E.
June 2nd 2011, 05:38 PM
bambamm
Finding the general solution of the D.E.
Q. Find the general solution of (x+y*e^y)*dy/dx = 1.
I'm having trouble solving this. I know you have to make this D.E. linear by interchanging dx and dy. So you have to solve for x(y) and treat... | 5 | [
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proving positive definiteness
July 18th 2010, 11:20 AM #1
Newbie
Joined
Jul 2010
Posts
1
proving positive definiteness
Can someone help with this exercise?
Given a symmetric n x n positive definite matrix A, and an arbitrary non-
singular n x n matrix P, show that P'AP is positive definite.
... | 5 | [
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Calculate the correlation coefficient of the following table
December 4th 2009, 08:45 PM #1
Banned
Joined
Dec 2008
From
Mauritius
Posts
523
Calculate the correlation coefficient of the following table
Question :
Calculate the correlation coefficient of the following heights(in inches) of father... | 4 | [
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TRIG help quickly please
Posted by Greg on Tuesday, January 14, 2014 at 10:55pm.
Mark any solutions to the equation 2cos2x - 1 = 0. The answer can be more than one. Thank you
π/8
-7π/4
15π/4
3π/4
• TRIG help quickly please - Reiny, Tuesday, January 14, 2014 at 11:22pm
2 cos (2x) - 1 = 0
cos (2x) = 1/2
... | 4 | [
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Geometric progression
and these question's answer is 40? In a Geometric progression : a5 is 24 more than a3. => a5-a3=24 if terms are Integer and positive. a3+a5=?
A geometric progression is one of the form $a, ar, ar^2, ar^3,\ldots$. So, suppose $a_0 = a, a_1 = ar, a_2 = ar^2, a_3 = ar^3, a_4 = ar^4, a_5 = ar^5$. The... | 5 | [
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Math - Algebra
Posted by Albert on Friday, November 13, 2009 at 9:30pm.
If I have a garden that is square with sides of length x feet and next spring I plan to make it rectangular by lengthening one side 3 feet and shortening the other side by 3 feet.
Find a polynomial A(x) that represents the new area.
By how much ... | 4 | [
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Let N be a 5 digit number...
February 24th 2007, 02:13 PM #1
Member
Joined
Sep 2006
Posts
75
Let N be a 5 digit number...
Let N be a 5 digit number, and let Q and r be the quotient and remainder, respectively, when N is divided by 100. For how many values of N is Q + R divisible by 11?
That means we... | 4 | [
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Problem 1
1. y = x^3 - 3x
Find any x and y intercepts, asymptotes, horizontal, vertical, or otherwise, find where the function assumes positive values and where it assumes negative values, the places where the first
derivat... | 4 | [
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Hohmann Transfer Orbit Equation
S.T.E.M. Project #1 Pulp Science Fiction Cover
Narrative
In this, the first of a four-part interconnected astronautics-based S.T.E.M. project, students will calculate the change in orbital velocity (Delta V) needed to change the orbital altitude of a
spacecraft.
Students will also ca... | 4 | [
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Homework Help
Posted by Josh on Tuesday, September 2, 2008 at 10:21pm.
1/2x+6=1/3x
Please help. my college grad mom can't help with my 8th grade math!
• algebra - DrBob222, Tuesday, September 2, 2008 at 10:31pm
Are you solving for x?
Is the equation (1/2)x + 6 = (1/3)x.
Multiply both sides by 6.
(... | 4 | [
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What is 9c asking in this question? (Orthogonal Matrix)
April 7th 2013, 11:20 PM #1
Junior Member
Joined
Mar 2013
From
New Zealand
Posts
35
What is 9c asking in this question? (Orthogonal Matrix)
I have done a) yes it is (checking that u1.u2, u2.u3 and u1.u3 = 0 & b) by creating an augmented matr... | 5 | [
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Homework Help
Posted by ifi on Monday, December 10, 2012 at 3:21am.
can someone show me how to solve this problem.
It determines that in order to sell x smartphones, the price per product must be p=280-0.4x. It also determine that the total cost of producing x smartphones is given by C(x)=5000+0.6x.
a. Find the tota... | 4 | [
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Homework Help
Posted by Zac on Wednesday, July 25, 2012 at 8:24pm.
A block of mass m = 2.00 kg rests on the left edge of a block of mass M = 8.00 kg. The
coefficient of kinetic friction between the two blocks is 0.300, and the surface on which the 8.00-
kg block rests is frictionless. A constant horizontal force of ... | 5 | [
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