content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Deriving the Poisson Distribution from the Binomial Distribution
At first glance, the binomial distribution and the Poisson distribution seem unrelated. But a closer look reveals a pretty interesting relationship. It turns out the Poisson distribution is just a
special case of the binomial -- where the number of trial... | 5 | [
-0.000518798828125,
-0.014892578125,
0.0169677734375,
0.050048828125,
0.00860595703125,
-0.0478515625,
0.07373046875,
-0.00994873046875,
0.1435546875,
0.06591796875,
0.08984375,
0.03564453125,
-0.0021820068359375,
-0.0150146484375,
0.07958984375,
-0.047119140625,
0.0030517578125,
-... | 4,400 | 4400 | |
A person travels by car from one city to another with different constant speeds betwe
October 14th 2010, 11:37 PM #1
Senior Member
Joined
Oct 2009
Posts
290
A person travels by car from one city to another with different constant speeds betwe
A person travels by car from one city to another with diff... | 4 | [
0.0576171875,
0.08349609375,
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0.1103515625,
-0.0859375,
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0.044677734375,
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0.0213623046875,
-0.031982421875,
0.0... | 4,401 | 4401 | |
Asymptote and end behaviour
January 2nd 2008, 07:02 AM #1
Member
Joined
Dec 2007
Posts
76
Asymptote and end behaviour
Given the rational function 2x^2-8x+5/2x63-5x^2+3x. Determine the following (show all work, explaining how/why that is the result):
a)horizontal and vertical asymptote(s)
b)end be... | 4 | [
-0.0537109375,
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0.03125,
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0.064453125,
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0.051025390625,
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... | 4,402 | 4402 | |
Isochron Dating
Isochron Dating
b... | 4 | [
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0.07080078125,
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0.044921875,
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-0.09912109375,
... | 4,403 | 4403 | |
Existence of series of random variables
January 8th 2011, 11:48 AM #1
Newbie
Joined
Dec 2010
Posts
10
Existence of series of random variables
Is it possible that following series of random variables exists?
$P({\omega \in \Omega : lim_{n -> \infty} X_{n}=0})=0.5$
Thx for any help
Hello,
... | 5 | [
-0.08447265625,
-0.01953125,
0.0634765625,
0.029296875,
0.060302734375,
0.032958984375,
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0.1064453125,
0.0419921875,
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0.000949859619140625,
0.01904296875,
0.004913330078125,
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-0... | 4,404 | 4404 | |
Evaluation of Analytical Data
ACCURACY and PRECISION
Precision
A description of the reproducibility of results.
Accuracy
A description ... | 4 | [
0.031005859375,
0.06884765625,
-0.03564453125,
0.00164031982421875,
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0.10546875,
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0.06298828125,
0.033447265625,
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0.134765625,
0.010498046875,
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-0.0576171875,
0.06494140625,
0.006378173828125... | 4,405 | 4405 | |
Solving an ODE using RungeKutta methods.
solving pde by method of lines using ode solver
Dear all, I am trying to solve PDE's by discretizing the space domain equations using finite difference scheme (method of lines) and solving the resultant ode's using ode solver ode15s. I am facing
two problems 1. Warning: Failure... | 4 | [
-0.0986328125,
0.0654296875,
0.020751953125,
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0.09375,
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0.032470703125,
-0.0213623046875,
-0.00078964233... | 4,406 | 4406 | |
Find the derivative of the following equation in fully simplified form
April 10th 2013, 01:30 PM #1
Newbie
Find the derivative of the following equation in fully simplified form
Re: Find the derivative of the following equation in fully simplified form
It's pretty close to being right! Your function is $G(x)= 3... | 5 | [
0.035888671875,
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0.064453125,
0.0047607421875,
-... | 4,407 | 4407 | |
Conic Sections
A conic section is the intersection of a plane and a right circular cone. By changing the angle of the plane the intersection can be: a circle, an ellipse, a parabola, or a hyperbola. If the plane
intersects the ... | 4 | [
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0.03369140625,
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0.020263671875,
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0.01867... | 4,408 | 4408 | |
Mastering Physics Solutions: Changing Capacitance Yields a Current
Changing Capacitance Yields a Current
Part A = I = ((K-1) * r^2 * ε[0] * V) / (d * Δt)
Solution Below:
Each plate of a parallel-plate capacator is a square with side length r, and the plates are separated by a distance d. The capacitor is connected t... | 5 | [
0.0017547607421875,
0.07958984375,
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0.006988525... | 4,409 | 4409 | |
Trig Word Problem
November 15th 2006, 08:42 AM #1
Trig Word Problem
A hot-air balloon is floating above a straight road. To calculate their height above the ground, the balloonists simultaneously measure the angle of depression to two consecutive mileposts on the
road on the same side of the balloon. The angl... | 4 | [
-0.006927490234375,
0.037841796875,
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0.10009765625,
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0.0013885498046875,
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... | 4,410 | 4410 | |
Help with Algebra??
07-10-2003, 03:18 AM #2
Mentor
Join Date
Jun 2001
Posts
1,672
07-10-2003, 02:03 AM #1
Guest
Re:Help with Algebra??
Help with Algebra??
This question is off topic. I have to take a Placement Test for college to see what classes that should put me in. So i got a library book on forgot... | 4 | [
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0.08447265625,
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0.015869140625,
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0.051513671875,
-0.09423828125,
... | 4,411 | 4411 | |
energy notes
Metric unit of energy is the joule or the erg :
1 joule = 10^7 ergs
1 erg = kinetic energy of a mosquito in full flight!
1 gram of TNT (about a thimbleful) releases about 4 X 10^10 ergs when it is detonated. So a kilogram of TNT would release about 4 X 10^13 ergs.
Let's work out the KE of a bicyclist g... | 4 | [
0.08251953125,
0.1162109375,
0.0054931640625,
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0.13671875,
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0.05322265625,
0.041259765625,
0.0255126953125,
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0.035400390625,
0.018798828125,
0.031005859375,
0.0030975341796875,
0.07763671875,
0.0766601562... | 4,412 | 4412 | |
Few Urgent Linear Algebra Questions
November 16th 2008, 09:54 PM #1
Member
Joined
Nov 2008
Posts
76
Few Urgent Linear Algebra Questions
1. Determine which of the following formulas hold for all invertible nxn matrices A and B
a. A+B is invertible
b. (I - A)(I + A) = I - A^2
c. A^9 is inverti... | 5 | [
-0.06298828125,
-0.040283203125,
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0.015380859375,
-0.00592041015625,
0.02978515625,
0.02294921875,
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0.05712890625,
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-0.04296875,
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0.03076171875,
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-0.04370117... | 4,413 | 4413 | |
scipy.maxentropy.conditionalmodel
A conditional maximum-entropy (exponential-form) model p(x|w) on a discrete sample space.
This is useful for classification problems: given the context w, what is the probability of each class x?
The form of such a model is:
p(x | w) = exp(theta . f(w, x)) / Z(w; the... | 4 | [
-0.052978515625,
-0.061767578125,
0.000591278076171875,
-0.0198974609375,
0.05517578125,
-0.048828125,
0.0033721923828125,
0.01336669921875,
-0.0220947265625,
0.00494384765625,
0.026611328125,
0.029052734375,
0.08056640625,
0.05810546875,
-0.00286865234375,
-0.00017547607421875,
0.05... | 4,414 | 4414 | |
Machined Learnings
There's an encoding that I use for text classification problems that empirically helps improve performance when using a linear classifier such as
Vowpal Wabbit
with nominally encoded tokens. In other words, if you are feeding input like this
1 | boys will be boys
-1 | i came i saw i conque... | 4 | [
-0.061279296875,
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0.005950927734375,
0.027587890625,
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0.0341796875,
0.002105712890625,
0.0791015625,
0.0137939453125,
0.08984375,
0.1640... | 4,415 | 4415 | |
Motive (algebraic geometry)
From Wikipedia, the free encyclopedia
In algebraic geometry, a motive (or sometimes motif, following French usage) denotes refers to 'some essential part of an algebraic variety'. To date, pure motives have been defined, while
conjectural mixed motives have not. Pure motives are triples (X,... | 4 | [
-0.039306640625,
0.006256103515625,
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0.00347900390625,
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0.01409912109375,
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0.024169921875,
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0.053466796875,
0.138671875,
-0.00897216796875,
0.006744384765625,
... | 4,416 | 4416 | |
A
AM Radio Receiver
08 Sep 2011 (Updated 15 Sep 2011)
Heavily commented simulation of the heterodyne section and demodulating section of an AM receiver
AM_radio.m
% T... | 4 | [
0.05322265625,
0.03857421875,
-0.091796875,
0.0029754638671875,
0.01806640625,
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0.01495361328125,
0.00543212890625,
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0.0537109375,
0.00531005859375,
-0.04443359375,
0.06298828125,
0.047119140625,
-0.054... | 4,417 | 4417 | |
The Great Calculation According to the Indians, of Maximus Planudes - On Finding the Square Root of Any Number
Since we have dealt with different problems arising from astronomical calculation, let us now deal with the quadrature of numbers which are not perfect squares, to show clearly that it is possible to
find the ... | 4 | [
0.012451171875,
0.04931640625,
0.011962890625,
0.02685546875,
-0.09521484375,
-0.03076171875,
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0.07666015625,
0.052978515625,
0.03564453125,
0.00811767578125,
0.049072265625,
0.0159912109375,
0.0233154296875,
-0.06982421875,
-0.0615234375,
-0.0228271484375,
0.0444335... | 4,418 | 4418 | |
with interesting Galois groups
Trinomials ax^n+bx+c with interesting Galois groups
In 1969 Trinks discovered that the irreducible trinomial
x^7 - 7 x + 3... | 4 | [
-0.0888671875,
-0.044189453125,
-0.05908203125,
0.031005859375,
0.0245361328125,
0.03466796875,
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-0.04345703125,
-0.0771484375,
0.0... | 4,419 | 4419 | |
A little derivative help (definition of derv.)
May 14th 2013, 05:22 PM #1
Member
Joined
Sep 2012
From
US
Posts
123
A little derivative help (definition of derv.)
Hey guys, I'm using the definition of derivative to find f'(a), this always makes a mess. This is what I have done so far;
Question: f... | 4 | [
-0.046875,
0.062255859375,
-0.0030059814453125,
0.0169677734375,
-0.0005340576171875,
0.040283203125,
-0.0274658203125,
-0.058837890625,
0.045654296875,
0.04296875,
0.11083984375,
-0.08056640625,
0.0306396484375,
-0.0279541015625,
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0.040771484375,
-0.07958984375,
0... | 4,420 | 4420 | |
Numb3rs
Numb3rs 101: Pilot
In this episode, a serial murder-rapist has made numerous attacks in the Los Angeles area. Making some seemingly harmless basic assumptions, Charlie builds a statistical model of the attacker's
behavior which helps the FBI stop the murders.
What does practical mean?
A model of the attack... | 4 | [
-0.0218505859375,
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0.01470947265625,
0.05029296875,
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0.055908203125,
0.037109375,
0.037109375,
0.0947265625,
0.043701171875,
0.0274658203125,
0.004974365234375,
-0.044677734375,
0.010986328125,
0.01031494140625,
-0.0412... | 4,421 | 4421 | |
problem on circle theorems
March 14th 2009, 02:11 AM #1
problem on circle theorems
PQ is a variable chord of the smaller of two fixed concentric circles.
PQ produced meets the circumference of the larger circle at R. Prove that the product
RP.RQ is constant for all positions and lengths of PQ.
How wo... | 4 | [
-0.07861328125,
0.03955078125,
-0.0115966796875,
-0.013671875,
0.0169677734375,
0.0299072265625,
0.072265625,
0.09423828125,
0.0296630859375,
-0.00518798828125,
0.030029296875,
0.01007080078125,
0.05224609375,
0.044921875,
0.006744384765625,
0.017822265625,
-0.0673828125,
0.0174560... | 4,422 | 4422 | |
probability
May 29th 2005, 12:15 PM #1
Junior Member
Joined
May 2005
Posts
25
3 companies
the probanility that there profit will increase is
companyA 0.70
companyB 0.50
companyC 0.65
what is the probability that at least on company shows a profit increase?
so far i have only figu... | 4 | [
0.00124359130859375,
0.019287109375,
-0.00003314018249511719,
-0.09814453125,
-0.01519775390625,
-0.00634765625,
0.017333984375,
0.0155029296875,
0.0064697265625,
0.024169921875,
0.03857421875,
-0.03515625,
0.012451171875,
-0.0024871826171875,
0.047119140625,
0.0595703125,
-0.0554199... | 4,423 | 4423 | |
MathGroup Archive: September 1997 [00323]
[Date Index] [Thread Index] [Author Index]
Re: Unsolved integral
• To: mathgroup at smc.vnet.net
• Subject: [mg8879] Re: [mg8826] Unsolved integral
• From: seanross at worldnet.att.net
• Dat... | 4 | [
-0.0036773681640625,
-0.0927734375,
0.016357421875,
-0.0235595703125,
0.00555419921875,
-0.06982421875,
-0.0262451171875,
-0.06884765625,
0.017578125,
0.09326171875,
-0.00070953369140625,
-0.0257568359375,
0.022705078125,
0.06201171875,
0.0703125,
0.08544921875,
-0.0098876953125,
-... | 4,424 | 4424 | |
Growth Rates
April 26th 2008, 12:48 PM #1
Newbie
Joined
Apr 2008
Posts
18
The birth rate in a certain city is described by the following function
The city's death rate is given by
Here, t is measured in years, and t = 0 corresponds to the start of the year 1990. The birth and death rates are meas... | 4 | [
-0.0037841796875,
0.04833984375,
0.0380859375,
-0.059326171875,
0.0024261474609375,
0.0201416015625,
-0.03369140625,
0.11572265625,
-0.07080078125,
0.046630859375,
0.1259765625,
-0.0546875,
0.0181884765625,
0.037353515625,
0.00946044921875,
0.0654296875,
-0.07421875,
-0.05590820312... | 4,425 | 4425 | |
Dense Set Problem
November 15th 2012, 07:54 AM #1
Dense Set Problem
Suppose $(X, \Omega)$ is a topological space, and suppose that $U \subseteq X$ is an open subspace of $X$. If $D$ is a dense subset of $X$, prove that $D \cap U$ is dense in $U$.
Here's my attempt at a proof (with help from other people)... ... | 5 | [
0.0654296875,
0.04052734375,
0.09765625,
-0.0341796875,
0.0712890625,
-0.0033111572265625,
0.1015625,
-0.03857421875,
-0.025390625,
-0.06396484375,
-0.043701171875,
-0.0546875,
0.02978515625,
0.033935546875,
0.05224609375,
-0.042236328125,
0.055419921875,
-0.036865234375,
0.01446... | 4,426 | 4426 | |
GMAT Tip of the Week: Some Means Anything-But-None
You can’t talk about probability without mentioning Las Vegas, and with the football gambling season looming it seems time for a probability-themed post with a gambling lead. As the football season
approaches, you may well be placing your futures bets, noting that Ala... | 4 | [
-0.0732421875,
-0.0458984375,
-0.022216796875,
-0.042724609375,
-0.037841796875,
-0.000072479248046875,
-0.002716064453125,
-0.052490234375,
0.10888671875,
-0.015869140625,
-0.08837890625,
-0.0242919921875,
0.054443359375,
-0.0693359375,
-0.0167236328125,
-0.048095703125,
0.010986328... | 4,427 | 4427 | |
simplifying radicals and fractional indices
April 15th 2009, 01:07 AM #1
Newbie
Joined
Apr 2009
Posts
4
simplifying radicals and fractional indices
Hi there
First post here. I hope you can help!
I have a complete block on simplifying the following -
(x²-1)².√(x+1) ÷ (x-1)^1.5
I have t... | 4 | [
-0.051513671875,
0.029052734375,
0.07421875,
0.057861328125,
0.0252685546875,
0.018798828125,
-0.0184326171875,
-0.01177978515625,
0.060302734375,
0.0081787109375,
-0.0052490234375,
0.00921630859375,
0.0218505859375,
0.078125,
-0.040771484375,
0.061279296875,
-0.04345703125,
-0.015... | 4,428 | 4428 | |
MathGroup Archive: September 1997 [00363]
[Date Index] [Thread Index] [Author Index]
RE: Re: Several variab
• To: mathgroup at smc.vnet.net
• Subject: [mg8533] RE: [mg8409] Re: [mg8340] Several variab
• From: Ersek_Ted%PAX1A at mr.naw... | 5 | [
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Alligation/Mixture Problems | Lofoya
ALLIGATION: IMPORTANT FACTS AND FORMULAE
ABOUT THE PAGE
PageInfo
This is the aptitude questions and answers section on "Alligation or Mixture" with detailed explanation for various interview, competitive examination and entrance test. Problems of three difficulty
levels are giv... | 4 | [
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... | 4,430 | 4430 | |
proof that 0 is not equal to 1
January 14th 2011, 10:48 PM #1
Member
Joined
Sep 2009
Posts
158
proof that 0 is not equal to 1
I'm not very experienced when it comes to writing proofs, and I have come up with two proofs for 0 =/= 1, both by reductio ad absurdum. Is either one of them valid?
for any f... | 5 | [
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ormal distribution
Normal distribution
From CryptoDox, The Online Encyclopedia on Cryptography and Information Security
Template:Probability distribution\; \exp\left(-\frac{\left(x-\mu\right)^2}{2\sigma^2} \right) \!</math>|
cdf =<math>\frac12 \left(1+\mathrm{erf}\,\frac{x-\mu}{\sigma\sqrt2}\right) \!</... | 4 | [
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0.0... | 4,432 | 4432 | |
Z-module homomorphism
November 27th 2009, 09:01 AM #1
Newbie
Joined
Nov 2009
Posts
14
Z-module homomorphism
Let $M=\{(a_i): a_i \in \mathbb{Z}, i\geq 1\}$ (M a $\mathbb{Z}$-module); let N be the Z-submodule of M generated by $\{e_n: n\geq 1\}$ (where $e_n = (0,0,\ldots,0, 1 \text{(nth place)}, 0, \
l... | 5 | [
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----------------- What is a photon? ----------------- According to quantum electrodynamics, the most accurately verified theory in physics, a photon is a single-particle excitation of the free
quantum electromagnetic field. More formally, it is a state of the free electromagnetic field which is an eigenstate of the pho... | 4 | [
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Help with Algebra??
07-11-2003, 08:26 PM #22
Guest
07-11-2003, 08:23 PM #21
Guest
Re:Help with Algebra??
Re:Help with Algebra??
Hey Lovechild and everyone. I can't even do simple algebra. When the time comes what should i do for nagitive exponents?? And square roots raise to a power??
okay step one
... | 4 | [
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Find dy/dx in terms of x and y
April 25th 2009, 06:28 AM #1
Newbie
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Posts
8
Find dy/dx in terms of x and y
Find dy/dx in terms of x and y for: xy = tan(xy)
I'm not too good with this so pls dont skip steps pls.
Last edited by mr fantastic; April 25th 2009 at 07:10 AM. Reason: Rem... | 5 | [
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ANTENNA & WAVE PROPAGATION (2 marks question and answer)
1) What is magnetic vector potential?
The source for magnetic vector potential is current element. The
current having both magnitude and direction. Hence the potential in the case
of magnetic field is magnetic vector potential.
The expressions for magnetic vector... | 5 | [
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VolatilityModel
Volatility Model
Our theory of markets is derived from the continuous double auction model (CDA), with the requirement that the buy and sell limit order books organize the prices in a manner that each has a heavy
power tail. With the CDA model, price movements occur when there is a mismatch between buy... | 4 | [
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Proposition 15
If two straight lines meeting one another are parallel to two straight lines meeting one another not in the same plane, then the planes through them are parallel.
Let the two straight lines AB and BC meeting one another be parallel to the two straight lines DE and EF meeting one another not in the same... | 4 | [
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Numeric Entry
Numeric Entry Practice Test 2
Question 1
A sum of money becomes 8 times itself in 15 years when placed at compound interest. In how many years will it double itself?Correct Answer: 5 years
Correct Answer: 5 years.
Explanation:
Let P, R and T be the principle, rate and time and A be the amount.
A... | 4 | [
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... | 4,440 | 4440 | |
Noether's Theorem: Quantum vs Stochastic
Noether’s Theorem: Quantum vs Stochastic
guest post by Ville Bergholm
In 1915 Emmy Noether discovered an important connection between the symmetries of a system and its conserved quantities. Her result has become a staple of modern physics and is known as Noether’s
theorem.
T... | 4 | [
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0... | 4,441 | 4441 | |
Problem Solving Select Many GRE Sample Questions
Problem Solving Select Many GRE Sample Questions 2
GRE Problem Solving Select Many Sample Questions
GRE Problem Solving Select Many Sample Questions 1 | GRE Problem Solving Select Many Sam... | 4 | [
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-0... | 4,442 | 4442 | |
Math Help
Suppose that x/y= 4/7 And that y/z=14/3 What is the value of x+y/z Express your answer as a common fraction.
Hello, Dragon! Suppose that: $\frac{x}{y} = \frac{4}{7}$ and $\frac{y}{z} = \frac{14}{3}$ What is the value of $\frac{x + y}{z}$ ? Multiply the two equations: . $\frac{x}{y}\cdot\frac{y}{z}\:=\:\frac... | 4 | [
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0... | 4,443 | 4443 | |
GCF factoring Question
May 23rd 2008, 10:48 AM #1
Regarding GCF factoring, can the same answer be derived from multiple number sets? Specifically fin the following problem:
$40a^5x+80a^5y-120a^5z$ & its answer 40a^5(x + 2y - 3z)
40 obviously is the GCF and goes into all three numbers. But what if one doe... | 4 | [
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-0.1484375... | 4,444 | 4444 | |
Math Help
April 7th 2008, 02:41 PM #1
Newbie
Joined
Feb 2008
Posts
4
tracks
A jogging park has 2 identical circular tracks touching each other, and a rectangular track enclosing the 2 circles.The edges of the rectangles are tangential to the circles.Two friends , A and
B, start jogging simultaneousl... | 4 | [
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span Polynomial-concept and method confusion
July 5th 2013, 08:52 PM #1
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Joined
May 2013
From
england
Posts
100
span Polynomial-concept and method confusion
Show that X spans P2
P[2 consists of all polynomials of degree less than or equal to 2. let X={][p1, p2,p3} ]where p1=x+2
p2=3-x
... | 5 | [
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... | 4,446 | 4446 | |
Linear transformation problem
February 24th 2010, 02:47 AM #1
Newbie
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Feb 2010
Posts
11
Linear transformation problem
A linear transformation is given: $T:R^3 -> R^3$ such as:
$T(1,1,1)=(1,1,1)$
$T(0,1,0)=(0,1,0)$
$T(1,0,2)=(1,0,1)$
Find $T(x,y,z)$ and $[T]_E$$(E={(1,0,0),(0,1,0),(0... | 5 | [
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... | 4,447 | 4447 | |
GMAT
Author Message
Post subject: A box contains 100 balls, numbered from 1 to 100...
I_need_a_700plus Posted:
Fri Aug 21, 2009 5:52 pm
The following problem is from ... | 4 | [
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Problem 5
A small wheel of 1 inch radius is put inside a circular track of 10 inch radius as shown. If the small wheel is rotated clockwise on the circular track without slipping until it comes back to its
starting point P, how many turns will the small wheel make? Justify your answer.
[Problem submitted by Steve Lee... | 4 | [
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Sample of College-Level Math Attributes in Finite Mathematics/Math
Modeling
An introduction to finite mathematics. Topics include systems of linear equations, matrices, the Gauss-Jordan method, inequalities and linear programming, sets and counting techniques, probability,
difference equations, Markov processes, game... | 5 | [
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-0.007141113281... | 4,450 | 4450 | |
The Gaussian Correlation Conjecture
The Gaussian correlation conjecture is a simple looking inequality which, nevertheless, remains unproven. The standard n-dimensional Gaussian measure is
$\displaystyle \mu_n(A) = (2\pi)^{-n/2}\int_A\exp(-\frac{1}{2}x^2... | 5 | [
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0.109375,
-0.044921875... | 4,451 | 4451 | |
Annihilator of a set M in inner product space X
May 31st 2009, 06:47 AM #1
Junior Member
Joined
Apr 2009
Posts
39
Annihilator of a set M in inner product space X
Show that the annihilator (M perpendicular) of a non-empty set M in an inner product space X, is a closed subspace of X.
Let $x,y \in ... | 5 | [
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0.045166015625,
0.000736... | 4,452 | 4452 | |
tan (α-β)
April 2nd 2012, 02:15 PM #1
Newbie
Joined
Apr 2012
From
United States
Posts
19
tan (α-β)
finding the exact value of tan (α-β) when:
tan α = -(5/12) in quad II and cos β = 3/4 and lies in quad I
Triangle α
x = -12
y = 5
r = 13
Triangle β
x = 3
y = √7 (suppose... | 4 | [
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0.0115966796... | 4,453 | 4453 | |
MathGroup Archive: October 2011 [00358]
[Date Index] [Thread Index] [Author Index]
A possible typo in the program of "Mathematica Navigator" by Heikki
• To: mathgroup at smc.vnet.net
• Subject: [mg122114] A possible typo in the program ... | 4 | [
-0.099609375,
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Determination of heat transfer coefficients of foods.
Link/Page Citation
Abstract
Cooling and freezing of food by forced convection is one of the most significant applicati... | 4 | [
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0.019409179... | 4,455 | 4455 | |
RLC Circuits
RLC Circuits
SERIES
RLC CIRCUITS The principles and formulas that have been presented in previous tutorials related to this section are used in all ac circuits. The examples given have been series circuits.
This section of the chapter will not present any new material, but will be an example of using a... | 5 | [
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IntroductionBending MomentHarmonic Vibration of a Simply Supported Composite PlateFinite Element AnalysisParametric Study and VerificationThree Different Sizes of Piezoelectric ActuatorsExcitation Frequency p = 350 rads/sExcitation Frequency p = 870 rads/sExcitation Frequency p = 650 rads/sVariation of Piezoelectric Ac... | 4 | [
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-0.033447265625,
0.1513671875,
-0.024902... | 4,457 | 4457 | |
Inferences about One-Pop. Standard Deviation on the TI-83/84
Copyright © 2008 by Stan Brown, Oak Road Systems
Summary: This Web page presents a downloadable TI-83/84 program that lets you perform a hypothesis test on standard deviation or variance of a population, or compute a confidence interval about
standard devia... | 5 | [
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An application of Castigliano’s Second Theorem with Octave
October 24th, 2009 at 5:53 pm by Dr. Drang
This week I did an analysis of a set of leaf springs and found myself using a favorite technique that I seldom get to apply anymore: Castigliano’s Second Theorem. There is some real, though not
especially difficult, m... | 5 | [
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0.029052734375,
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... | 4,459 | 4459 | |
-
Demo of gaimc - 'Graph Algorithms In Matlab Code'
Matlab includes great algorithms to work with sparse matrices but does provide a reasonable set of algorithms to work with sparse matrices as graph data structures. My other project -- MatlabBGL --
provides a high-performance solution to this problem by directly in... | 5 | [
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-0.... | 4,460 | 4460 | |
Compact metric
May 13th 2008, 12:47 AM
namelessguy
Compact metric
I know I have to check 3 properties of a metric space, but I don't know how to approach it here. Could somebody help?
Let M be the set of all bounded sequences ( $x_n$) of real numbers:
1) Show that d( ( $x_n$), ( $y_n$) )= sup {absolute v... | 4 | [
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Integral with limit
February 15th 2013, 12:33 PM #1
Member
Joined
Dec 2012
From
NY
Posts
105
Thanks
1
Integral with limit
Express the limit as a definite integral on the given interval.
lim n→
n x[i] ln(1 + x[i]^2) Δx, [0, 4]
i = 1
My work: I figured out that f(x) =... | 5 | [
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... | 4,462 | 4462 | |
Another Implicit Differentiation Question
September 27th 2012, 03:48 AM #1
Member
Joined
Jun 2012
From
Australia
Posts
86
Another Implicit Differentiation Question
This forum is such a good resource - I have another question regarding implicit differentiation that I can't find any information in my n... | 5 | [
-0.056640625,
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Markov Processes and Random Walks
October 5th 2008, 11:29 AM
n3mo
Markov Processes and Random Walks
Hello all! I'm currently facing this problem that is giving me all kinds of fits. I'm relatively new to Markov processes, but I feel like I understand how they work. Unfortunately, figuring out
the probabiliti... | 4 | [
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... | 4,464 | 4464 | |
IntroductionA Novel Filtering Strategy for Reliable NavigationStudent's t-Distribution for GNSS Measurement ErrorsAdaptation of GNSS Covariance to the Changing Signal ConditionsEquipment and TestingPedestrian Data in Urban CanyonPedestrian Data in Natural CanyonResults and AnalysesPedestrian Data in Urban CanyonPedestr... | 4 | [
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0.049072265625,
... | 4,465 | 4465 | |
[SOLVED] hm how does this integral work?
October 9th 2008, 12:24 PM #1
Member
Joined
Apr 2008
Posts
171
[SOLVED] hm how does this integral work?
this one seems to be tricky? can some1 figure out what the book did between these two steps?>?
{integral} 2 cscx dx
= 2 ln( cscx + cotx)
can anyb... | 5 | [
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Bianchi's entropy result-what to ask, what to learn from it
marcus
He shows that for all pure states of the quantum Rindler horizon it is identically true that
∂A/4 = ∂E/T
The argument that this extends by linearity to superpositions---to mixed states of the quantum Rindler horizon, and large assemblies thereof---... | 4 | [
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area under a curve as the limit of a sum of areas
March 23rd 2010, 01:08 AM #1
Member
Joined
Oct 2009
Posts
202
area under a curve as the limit of a sum of areas
A curve has a gradient function of $3x^2-2x+5$.Given that the curve passes through the point $(0,2)$,find the equation of the curve.
plea... | 4 | [
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A one-dimensional slope detection approach
Abstract
This paper extends the scale-invariant edge detector to the one-dimensional slope. It can accurately detect the slope and estimate its parameters. The method has been verified with several
mathematical functions, sample sizes, and noise levels. A contrast-invariant o... | 4 | [
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A-level Mathematics/MEI/FP2/Matrices
From Wikibooks, open books for an open world
Introduction[edit]
This section aims to expand upon information gathered about matrices in FP1, dealing with 3x3 matrices, eigenvectors and eigenvalues as well as the Cayley-Hamilton theorem.
Determinant of a 3x3 Matrix[edit]
How to f... | 5 | [
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-0.03637695... | 4,470 | 4470 | |
Understanding Volume Resistivity Measurements
Calculating Ohms-cm, Ohms-per-square, or Sample Thickness When Two of the Three are Known
& What Constitutes a Thin Film as Opposed to a Bulk Material... | 5 | [
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0.084472656... | 4,471 | 4471 | |
Partial derivatives with logarithms
February 29th 2008, 04:47 PM #1
Junior Member
Joined
Nov 2007
Posts
53
Partial derivatives with logarithms
Ok, so my original function is $f(x,y)=ln(x^2+y^2+1)$ and the problem states to take the partial derivative, first with respect to x, and then with respect to y, ... | 5 | [
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-0.... | 4,472 | 4472 | |
ma
Thomae’s function, named after Carl Johannes Thomae, also known as the popcorn function, the raindrop function, the countable cloud function, the modified Dirichlet function, the ruler function,^[1]
the Riemann function or the Stars over Babylon (by John Horton Conway) is a modification of the Dirichlet function. T... | 4 | [
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Math Help
December 7th 2006, 08:25 PM #1
Member
Joined
Nov 2006
From
Florida
Posts
228
dense ball
A solid spherical ball of radius $R$ is created in a way such that the density at the point $(x,y,z)$ is proportional to the point's distance from the origin.
What is the mass of the ball?
I ho... | 5 | [
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0.0517578125,
0.0026702880859... | 4,474 | 4474 | |
A stumper?
Hi;
This came up on another discussion group. Here I will show how easy this is to do with mathematica.
There are 5 different red balls, 5 different green balls, 5 different blue balls and 5 different black balls. In how many ways can they be arranged so that no two balls of same color are adjacent ?
The... | 5 | [
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Is this proof by induction set out well?
June 20th 2011, 05:05 AM
alexgeek
Is this proof by induction set out well?
Just wanted to check that this proof is set out correctly and that the last statement is logically correct:
Question
Quote:
Use mathematical induction to prove that $4^{2n}-1$ is di... | 5 | [
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-0.06738281... | 4,476 | 4476 | |
Differential Equations
June 20th 2008, 03:40 PM
Jessica098
Differential Equations
Given y(2) = 1, estimate y(2.5), where y(x) is the solution of the initial-value problem
y ' = 4y + 4xy.
Can anyone help me with this problem?
June 20th 2008, 04:07 PM
Krizalid
$4y+4xy=4y(1+x),$ which means that yo... | 5 | [
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-0.0390625,
... | 4,477 | 4477 | |
Logarithm help need explanation
$1{\rm{ }} - {\rm{ }}2{\log _7}x = {\log _7}7 - {\log _7}{x^2} = {\log _7}{7 \over {{x^2}}}$
Hi, this kind of problems involves the use of properties. So you want that expression to be simplified in one logarithm. First, let's write everything as a logarithm. We know that: $log_n (n) = ... | 4 | [
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0.0242919921875,
-0.026611328125,
-0.0903320312... | 4,478 | 4478 | |
First-Order ODE
September 21st 2011, 07:12 AM #1
Newbie
Joined
Sep 2011
Posts
5
Diff. Eq.:
$x{\it dy}- \left( 2\,{{\it xe}}^{-{\frac {y}{x}}}+y \right) {\it dx}=0$
Initial Condition:
y(1)=0
I don't see any way to get all the x and dx on one side and the y dy on the other. I assume the onl... | 4 | [
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-0... | 4,479 | 4479 | |
Data Structures And Algorithm Notes
Q. Bitwise Operations and Bitwise AND, OR, XOR and NOT Operators and Bit Masks
NOT - Bits that are 0 become 1, and those that are 1 become 0. Used to unset/turn off bit flags.
AND - Multiplication of bits; i.e., 1 × 0 = 0 and 1 × 1 = 1. Used to check state of a bit flag.
OR - 1 i... | 4 | [
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-0.030517578125,
-0.003936767578125,
-0.033447265... | 4,480 | 4480 | |
Real problem with this coursework
could i have help on parts B and C of this assignment please. Its really urgent :s
f(t) = 5 e^(-0.8 t) sin(2 pi t / 3) (b) find f'(t). Use the product rule: f'(t) = 5 d/dt[e^(-0.8 t)] sin(2 pi t /3) + 5 e^(-0.8 t) d/dt[sin(2 pi t / 3)] ......= 5 (-0.8) e^(-0.8) sin(2 pi t /3) + 5 e
^(... | 5 | [
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-0.0089111... | 4,481 | 4481 | |
MathGroup Archive: April 2007 [00416]
[Date Index] [Thread Index] [Author Index]
Re: how make function of solution by NDSolve depending on parameter?
• To: mathgroup at smc.vnet.net
• Subject: [mg75113] Re: [mg75096] how make function o... | 5 | [
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The Product Theorem
Product Theorem: Let $A, B$ be groups. Then $|A B| = |A| |B| / |A\cap B|$ and $A B$ is a group if and only if $A, B$ commute.
Let $D = A\cap B$. Then we can decompose $B$ into cosets relative to $D$
\[ B = D b_1 \cup D b_2 \cup ... \cup D b_n\]
where $n = |B| / |D|$ (and all cosets are distinct)... | 4 | [
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0.... | 4,483 | 4483 | |
IntroductionRotation of Covariance Matrix4-CSPD Algorithm Using Rotated Covariance MatrixExperimental Results and DiscussionsConclusionsReferencesFigures and Table
REMSE Remote Sensing 2072-4292 Molecular Diversity Preservation International (MDPI) 10.3390/rs4082199 remotesensing-04-02199 Article Four-Component Scatter... | 4 | [
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... | 4,484 | 4484 | |
Basic calculus Quotient rule question
November 21st 2008, 07:50 PM #1
Newbie
Joined
Nov 2008
Posts
14
Basic calculus Quotient rule question
Hi iam doin quotient rules in calculus and iam just getting stuck at a certain stage in this question.
The question is
$= \frac{3x+1}{\sqrt{x+1}}$
and th... | 4 | [
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... | 4,485 | 4485 | |
Ratio Test Lesson Plans & Worksheets | Lesson Planet
Ratio Test Teacher Resources
Find Ratio Test educational ideas and activities
Showing 1 - 16 of 16 resources
In this college level Calculus instructional activity, students use the ratio test to determine if a series converges or diverges. The one page instructio... | 4 | [
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Discrete Logarithm
The most obvious approach to breaking modern cryptosystems is to attack the underlying mathematical problem.
1. Factoring: given $N=\mathrm{pq},p<q,p≈q$, find $p,q$.
2. Discrete logarithm: Given $p,g,{g}^{x}modp$, find $x$.
Classical Algorithms
1. Brute force, e.g. trial division, which... | 4 | [
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Proofs and Confirmations
Corrections for
Proofs and Confirmations
Note that a reference to line 7b means the seventh line from the bottom o... | 4 | [
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Molarity Lesson Plans & Worksheets | Lesson Planet
Molarity Teacher Resources
Find Molarity educational ideas and activities
Showing 1 - 20 of 729 resources
Bright blue slides with bold text and graphics keep the attention of your junior chemists as you impart this information. Through this PowerPoint you will teach... | 4 | [
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14: DSP Examples
Programming dsPIC MCU in C
Chapter14: DSP Examples
14.1 Useful functions
At the beginning of this chapter the functions used in this chapter will be described together with some other useful functions. Table 14-1 presents a list of the functions including a description of
their parameters, results (... | 4 | [
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Multiple regression
Description
Multiple regression is a statistical method used to examine the relationship between one dependent variable Y and one or more independent variables X[i]. The regression parameters or coefficients b
[i] in the regression equation
are estimated using the method of least squares. In this... | 4 | [
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on
2D-7 : Humid Air and Relative Humidity 6 pts
Humid air at 75oC, 110 kPa and 30% relative humidity is fed into a furnace at a flow rate of 1000 m3/h. Determine t... | 5 | [
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Composition of Functions: Composing with Sets of Points
Composition of Functions:
Composing with Sets of Points (page 1 of 6)
Sections: Composing functions that are sets of point, Composing functions at points, Composing functions with other functions, Word problems using composition, Inverse functions and composition... | 4 | [
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series expansion for sin(e^x)
August 16th 2011, 11:24 AM
decoy808
series expansion for sin(e^x)
Use the series expansions for $e^x$ and sin(x) to find a series
expansion forsin( $e^x$)up to terms in x $^3$ .
Use your series to approximate http://quicklatex.com/cache3/ql_4184...e145775_l3.png
stating... | 5 | [
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Present Value of Multiple Cash Flows
Chapter5: Time Value of Money 2: Analyzing Annuity Cash Flows
Present Value of Multiple Cash Flows
The future value concept is very useful to understand how to build wealth for the future. The present value concept will help you most particularly for personal applications such as ... | 5 | [
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Comparative analysis of four solar models for tropical sites.
Link/Page Citation
ABSTRACT
This paper summarizes the results of a comparative analysis of four models (the Kasten, Mu... | 4 | [
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Matt Simpson
Recently Eli Dourado introduced the bitcoin volatility index or btcvol, a measure of bitcoin’s volatility. Eli estimates the volatility of the return to holding bitcoin at a given date by computing
the standard deviation of log returns from the past 30 days. This is fine so far as it goes – as a quick and ... | 4 | [
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Help
convert/ODE - convert ODEs to other ODEs of different type
Calling Sequence
convert(ODE, TYPE, y(x), keep, simplifier = ...)
convert(ODE, y_x, implicit)
Parameters
ODE - ODE (ordinary differential equation)
TYPE - one of: y_x, Riccati, linearODE, NormalForm, Abel, Abel_RNF,... | 5 | [
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Invertibility of 3x3 matrix.
February 9th 2011, 11:44 PM
ice_syncer
Invertibility of 3x3 matrix.
there is a 3 X 3 matrix ,
A = [ a b c]
[ b c a ]
[ c a b]
where a , b c are all distinct... can you prove that a + b + c is not 0 ?
the actual question is to prove whether it is invertible. If it ... | 5 | [
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