content string | quality_label int64 | meta string | all-MiniLM-L6-v2_embedding list | doc_id int64 | unique_id string |
|---|---|---|---|---|---|
Geometric progression
January 8th 2008, 12:00 PM #1
Junior Member
Joined
Jun 2007
Posts
62
Geometric progression
Hello guys, I need help solving the following question:
The sum of the first three terms in a geometric progression is 195. The difference (?) between the first and second term is larger ... | 4 | [
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0.0272216796875,
0.046142578125,
0.0301513671875,
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0.0267333984375,
0.0244140625,
0.07275390625,
-0.0010833740234375,
-0.057861328125,
-0... | 43,800 | 43800 | |
Is this seemingly novel irrational constant also transcendental?
up vote 20 down vote favorite
2
I recently discovered a constant that is constructed as follows:
$\chi=\sum_{n=1}^\infty (\frac{\cos{n}}{2|\cos{n}|}+\frac{1}{2}) 2^{-n}$
Furthermore I can prove that it is an irrational number whose decimal approximatio... | 4 | [
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0.0184326171875,
-0... | 43,801 | 43801 | |
references for theta characteristic
up vote 4 down vote favorite
Hi,
I am looking for references on theta characteristics. In particular I am interesting in understanding the isomorphism $\Omega_A^g\cong\mathcal{O}_A(\Theta)^2$ where $A$ is an abelian variety and $\
Theta$ is the theta divisor. What is the geometric ... | 4 | [
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0.0849609375,
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0.0200... | 43,802 | 43802 | |
Elementary end extension of a countable model for ZF
up vote 5 down vote favorite
Theorem 2.2.18 in Chang and Kiesler uses omitting types to show that any countable model of ZF has an elementary end extension. Can we control the countable order type of such a model? for example,
if $ X \prec H_ {\omega_2}$ can we have... | 5 | [
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Definition of Connectedness
March 6th 2010, 04:39 PM #1
Member
Joined
Aug 2009
Posts
130
Definition of Connectedness
In my book, "Real Mathematical Analysis" by Charles Pugh, a subset S of a metric space M is disconnected if there exists a proper, clopen subset of Because if the proper, clopen subset of ... | 4 | [
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CS70 - Lecture 13 - Feb 16, 2011 - 10 Evans
Goal for Notes 7 & 8: Review basic properties of polynomials
Use them to "share secrets"
Use them for error-correcting-codes
sending data reliably o... | 5 | [
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Understanding cascaded integrator-comb filters
The previously obscure CIC filter is now vital to many high-volume wireless communications tasks and equipment. Using CIC filters can cut costs, improve reliability, and help performance. Here's a
primer to get you started.
Cascaded integrator-comb (CIC) digital filters ... | 4 | [
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determinantal identity sought
up vote 2 down vote favorite
Suppose $A$ is a $n \times m$ matrix and $B$ is a $m \times n$ matrix. Then it is known that $det(I_{n}+AB)=det(I_{m}+BA)$.
Is there an analogous identity of the form $det(P_{1}+AB)=det(P_{2}+BA)$, where $P_{1},P_{2}$ are positive definite? Or something like ... | 5 | [
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Introductory Calculus: Average Rate of Change, Equations of LinesAlgebraLAB: StudyAids
Introductory Calculus: Average Rate of Change, Equations of Lines
AVERAGE RATE OF CHANGE AND SLOPES OF SECANT LINES:
The average
rate
of change of a
function f... | 4 | [
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... | 43,808 | 43808 | |
Two Equal Series?
up vote 4 down vote favorite
1
Hey all,
I'd like to know if anyone has a link to a proof of the following?
Take two infinite sequences $a_n$ and $b_n$ such that $$\sum_{n=1}^\infty a_n^s=\sum_{n=1}^\infty b_n^s=finite$$
for all $s\in\mathbb{N}$. Then, after some rearrangement, $a_i=b_i$ for all i?... | 5 | [
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primary ideal of regular local ring
up vote 1 down vote favorite
Let $(R,\mathfrak{m})$ be a regular local ring of dimension $d$. Let $P$ be a prime ideal of height $d-1$. I want to know if $P^2$ is always a $P$ primary ideal ie if $P/P^2$ is torsion free as $R/P$
module. Thanks.
Let me explain few of my observations... | 5 | [
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New Page 1
Under Root Geometries Structuring the Icosahedron, the other Basic Polyhedra and the Geometric Forms Related to Them, we refer to the basic geometric configurations which, as this theory
contemplates, are necessary for the progressive mode of formation of the five polyhedra, via lines, areas an... | 4 | [
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logarithm and domain range finding question
July 26th 2012, 10:24 AM
ameerulislam
logarithm and domain range finding question
Q: Find the domain of each function.
$g(x)=\log_{5}(\displaystyle{\frac{x+1}{x}})$
now the domain here is $x>0$ and $x<-1$
I want to know how to do calculate that?
I w... | 4 | [
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Find all (theta) 0 - Homework Help - eNotes.com
Find all (theta) 0<(theta)<2pi, Such that:
CSC(theta)= -2
`cosec(theta) = -2`
we know, `cosec(theta) = 1/sin(theta)` , then,
`1/sin(theta) =-2`
This gives,
`sin(theta) = -1/2`
`theta = sin^(-1)(-1/2)`
`theta = -pi/6`
This is the primary solution, to find the sol... | 4 | [
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Co-domain and Range
Introduction to Functions
Definition of Function: Domain, Co-domain and Range
Function can be easily defined with the help of the concept of mapping. Let X and Y be any two non-empty sets. "A function from X to Y is a rule or correspondence that assigns to each element of set
X, one and only one ... | 4 | [
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... | 43,814 | 43814 | |
Is choice needed to establish the existence of idempotent ultrafilters?
up vote 10 down vote favorite
2
It is well known that the Stone–Čech compactification $\beta \mathbb N^+$ of the positive natural numbers has the structure of a compact left semitopological semigroup and hence, by Ellis's lemma,
has idempotents. T... | 5 | [
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Prove for trianlge ABC
February 24th 2010, 06:20 PM
arze
Prove for trianlge ABC
1. $\cot C=\frac{a}{c}\csc B-\cot B$
I have not idea where to start here.
2. $abc=4\bigtriangleup R$ where R is the radius of the circumcircle, and $\bigtriangleup$ is the area of the triangle.
I used $\bigtriangleup=\sq... | 4 | [
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0.... | 43,816 | 43816 | |
Contour Maps in Matlab
In this activity we will introduce Matlab's contour command, which is used to plot the level curves of a multivariable function. Let's begin with a short discussion of the level curve concept.
Level Curves
Hikers and backpackers are likely to take along a copy of a topographical map when vertu... | 5 | [
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What are fixed points of the Fourier Transform
MathOverflow is a question and answer site for professional mathematicians. It's 100% free, no registration required.
The obvious ones are 0 and $e^{-x^2}$ (with annoying factors), and someone I know suggested hyperbolic secant. What other fixed... | 4 | [
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Parametric
BELT-AND-PULLEY EXAMPLE
A ½-hp electric motor, running at 1,800 rpm, will be used to drive
a grinding wheel operating at 600 rpm. A flat belt-and-pulley drive
system configuration has been selected
r = radius of
pulley
d = diameter of
pulley
φ= angle of
... | 5 | [
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0.00527954101... | 43,819 | 43819 | |
Balancing sticks – choose a longer stick
Maybe you have seen this trick. Basically, you hold by supporting it with two fingers from the bottom. You then move your hand around to keep it balanced while the stick is vertical. It is really not
as hard as it looks. Also, there are two things that can make your job easier. ... | 5 | [
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Solve for x in l x-3 l < 3. - Homework Help - eNotes.com
Solve for x in l x-3 l < 3.
l x-3 l < 3
We have two cases:
(x-3) < 3 and -(x-3) < 3
x < 6 and (x-3) > -3
x< 6 and x > 0
Then the solution is:
0 < x < 6
OR: x belong to the interval (0, 6)
|x-3| <3. To find the solutio... | 4 | [
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... | 43,821 | 43821 | |
Complex evaluation of a classical (real) integral
up vote 9 down vote favorite
4
There are several ways to compute the classical integral $$ \int_{\mathbb R}e^{-x^2}dx=\sqrt{\pi}. $$ Probably, best known are
(1) squaring the integral with subsequent change of (now two) variables to the polar form, and
(2) the reduci... | 5 | [
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Discrete or Continuous Problem
Associated Topics || Dr. Math Home || Search Dr. Math
Discrete or Continuous Problem
... | 4 | [
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ple
Binomial Distribution: Example #1
Objective: Compute probabilities and quantiles for a binomial random variable representing the number of correct guesses on a multiple-choice test and visualize these quantities using the Binomial
Applet.
Problem Description: A multiple choice test has four possible answers to ea... | 5 | [
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Random Variables for AP Statistics
By
Duane C. Hinders
— McGraw-Hill Professional
Updated on Feb 3, 2011
Practice problems for these concepts can be found at:
Recall the definition of an experiment (random phenomenon): An activity whose outcome we can observe and measure, but for which we can't predict the result... | 4 | [
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... | 43,825 | 43825 | |
Antiderivative of Log
June 4th 2011, 07:22 PM #1
Junior Member
Joined
Apr 2011
Posts
68
Antiderivative of Log
hi guys can you please help me with this:
Find f given that f''= $\frac{-3}{x^2}$, f'(3) =5, and f(1) =3.
I got this far:
f'= $\frac{3}{x} + 4$
f=3log(x)+ 4x + C = 3
so l... | 4 | [
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-0.0495605468... | 43,826 | 43826 | |
and
www.play-hookey.com Thu, 07-24-2014
| Direct Current | Alternating Current | Semiconductors | Digital | Logic Families | Digital Experiments | Computers |
| Analog | Analog Experiment... | 4 | [
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sequentially compact
sequentially compact
Every sequentially compact space is countably compact. Conversely, every first countable countably compact space is sequentially compact. The ordinal space $W(2\omega_{1})$ is sequentially compact
but not first countable, since $\omega_{1}$ has not countable local basis.
Nex... | 5 | [
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0.10595703125,
0.0234375,
0.01092529296875,
0.052490234375,
-0.0791015625,
0.028076171875,
0.07568359375,
0.0498046875,
0.03759765625,
-0.01422119140625,
0.00665283203125,
-0.0213623046875,
-0.0422363281... | 43,828 | 43828 | |
CirclePatterns
This code is an implementation of the Circle Pattern method for finding discrete conformal Delaunay parameterizations of triangle meshes of arbitrary genus. In short, this method works as follows:
given the initial mesh (and values for the cone singularities in case of higher genus meshes) it computes a... | 4 | [
-0.0198974609375,
0.07861328125,
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-0.0546875,
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0.017822265625,
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-0.05078125,
-0.0162353515... | 43,829 | 43829 | |
M
Download:
Math-GSL-0.27.tar.gz
Dependencies
Annotate this POD
Source Latest Release: Math-GSL-0.32
Math::GSL::Linalg - Functions for solving linear systems
use Math::GSL::Linalg qw/:all/;
Here is a list of all the functions included in this module :
gsl_linalg_matmult
gsl_linalg_matmult_mod
gsl_linalg_e... | 4 | [
-0.146484375,
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-0.02575683... | 43,830 | 43830 | |
Deriving and Balancing Metamorphic Reactions
A four page
summary (Acrobat (PDF) 33kB Jul31 07)
is available which can be used as a class handout.
Given a list of minerals, how do we determine all the possible reactions that can occur between them? There are many ways to approach this question and the answer can som... | 5 | [
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0... | 43,831 | 43831 | |
Errors-in-variables
In a previous post, I gave a cursory overview of how prior information about covariate measurement error can reduce bias in linear regression. In the comments, Rasmus Bååth asked about estimation in
the absence of strong priors. Here, I’ll describe a Bayesian approach for estimation and correction ... | 4 | [
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... | 43,832 | 43832 | |
Shortest Path
Hi,
I am sure most of you must be aware of dijkstra’s shortest path algorithm. Now here is a bit interesting version of it.
Problem : You are given a weighted connected graph with all edges having positive weights. Some of the cities ( nodes ) have petrol pump whereas some don’t. You have a car with th... | 4 | [
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0... | 43,833 | 43833 | |
Holomorphic line bundles on a punctured disc
up vote 8 down vote favorite
2
Is every holomorphic line bundle on the - say - punctured unit disc $\dot{\Delta} \subseteq \mathbf{C}$ trivial? Griffiths-Harris (p. 39) prove that $H^{p,q}_{\overline{\partial}}(\Delta) = 0$ (for
$q \geq 1$), and mention that by replacing di... | 5 | [
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... | 43,834 | 43834 | |
How the FFT constants were found
We have chosen to implement the FFT algorithm using the ring of integers mod 70383776563201. Here, we discuss how we discovered this value and other constants used in the algorithm.
First, it is a well-known fact from number theory that in a ring of integers mod m, a value i has a mul... | 4 | [
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-0.03295898437... | 43,835 | 43835 | |
Induction proof...I'm stuck!
November 18th 2008, 09:05 AM
dolphinlover
Induction proof...I'm stuck!
Hopefully someone can help me with this..I'm nearly done.
I'm in the induction step of the proof & here's what I have:
"So suppose that P(n) holds for n an integer and n>=5, we have that
2^n > n^2.
... | 5 | [
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Parametric Equations - Graphs of Parametrized Curves, Including Circles, Ellipses, Cycloids, and Lissajous Figures
Home >> Pre-Calculus >> 9. Conic Sections and Analytic Geometry
<< 9.4. Rotation of Axes
>> 9.6. Conic Sections in Polar Coordinates
... | 5 | [
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-0.0... | 43,837 | 43837 | |
Integration with trig functions
November 24th 2009, 04:04 AM
Beard
Integration with trig functions
Hi I'm stuck on a problem (I don't know if I am doing it correctly):
$\int \frac{1}{1 + x^2}.dx$
I have been given a hint to substitute x^2 with tan^2(u).
When I do this it becomes $\frac{1}{1 + tan^2... | 4 | [
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0.... | 43,838 | 43838 | |
Indicator Apparatus For Determining The Miss Distance Of A Projectile In Relation To A Fixed Or Moving Target - Patent 4323993
United States Patent: 4323993
( 1 of 1 )
United States Patent
4,323,993
Soderblom
, et al.
April 6, 1982
Indicat... | 4 | [
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-0.... | 43,839 | 43839 | |
ct
Context
2-category theory
Definitions
Transfors between 2-categories
Morphisms in 2-categories
Structures in 2-categories
Limits in 2-categories
Structures on 2-categories
Higher category theory
Basic concepts
Basic theorems
Applications
Models
Morphisms
Functors
Universal constructions
Extra propert... | 4 | [
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0.0756835937... | 43,840 | 43840 | |
CHAPTER 09 - Stocks and Their Valuation
CHAPTER 9
Stocks and Their Valuation
Features of common stock
Determining common stock values
Preferred stock
9-1
Facts about common stock
Represents ownership
Ownership ... | 5 | [
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The Effect of Fiber Orientation and Laminate Stacking Sequences on the Torsional Natural Frequencies of Laminated Composite Beams
Galal. A. Hassan^1, Mohammed. A. Fahmy^2, , Ibrahim. M. Goda^2
^1Mechanical Design and Production Department Faculty of Engineering, Cairo University, Giza Egypt
^2Industrial and Manufact... | 4 | [
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... | 43,842 | 43842 | |
Increasing and decreasing intervals
The steps for determining intervals are given as under :
1: Determine derivative of given function i.e. f’(x).
2: Determine sign of derivative in different intervals.
3: Determine monotonic nature of function in accordance with following categorization :
f ′ x ≥ 0 : equality hold... | 4 | [
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-0.0319824218... | 43,843 | 43843 | |
Understanding Specific Gravity and Extract
by Martin P. Manning
Republished from BrewingTechniques' September/October 1993.
Understanding the basis of extract potential enables you to refine your method, fine-tune your bill of materials, and ensure success in achieving the beer you seek. Simple conversio... | 4 | [
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0.02001953125... | 43,844 | 43844 | |
How Wide is the River?
Date: Tue, 2 Jul 1996 13:12:53 -0400 (EDT)
From: Anonymous
Subject: two ferryboats
Two ferryboats ply back and forth across a river with constant
but different speeds, turning at the riverbanks without loss of time.
They leave opposite shores at the same instant, meet for the first
time 900 me... | 4 | [
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0.0097... | 43,845 | 43845 | |
STOBJ-EXAMPLE-1-PROOFS
some proofs involving the counters stobj
Major Section: STOBJ
Consider again the event
(defstobj counters
(NodeCnt :type integer :initially 0)
(TipCnt :type integer :initially 0)
(IntTipsSeen :type t :initially nil))
discussed in stobj-example-1, followed by the definit... | 4 | [
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-0.0218505859375,
0.03662109375,
0.02197265625,
0.019287109375,
0.0... | 43,846 | 43846 | |
Performance Comparison of Speaker Identification using circular DFT and WHT Sectors
(IJCSIS) International Journal of Computer Science and Information Security,
... | 4 | [
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0.02770... | 43,847 | 43847 | |
groupoid
Context
Category theory
Concepts
Universal constructions
Theorems
Extensions
Applications
Contents
Definition
A groupoid $G$ is a category in which all morphisms are isomorphisms. Often the requirement is made that $G$ is small.
A groupoid is tame if its cardinality is finite.
Groupoids form a $2$-c... | 4 | [
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0.0771... | 43,848 | 43848 | |
Quasi-coherent module given by modules and compatibility conditions in the language of commutative algebra
up vote 1 down vote favorite
Short question
Can we describe a quasi-coherent module on a scheme by usual modules with respect to an affine cover, which satisfy some compatibility conditions, which can be formula... | 4 | [
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directed colimit
Context
Category theory
Concepts
Universal constructions
Theorems
Extensions
Applications
Limits and colimits
1-Categorical
2-Categorical
(∞,1)-Categorical
Model-categorical
Directed colimits
Abstract definition
A directed colimit is a colimit $\underset{\to}\lim F$ of a functor $F\colon ... | 4 | [
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0.057... | 43,850 | 43850 | |
Inverting Operational Amplifier - The Inverting Op-amp
Inverting Operational Amplifier
The Inverting Operational Amplifier
We saw in the last tutorial that the Open Loop Gain, ( Avo ) of an ideal operational amplifier can be very high, as much as 1,000,000 (120dB) or more. However, this very high gain is of no real u... | 5 | [
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0.05908203125... | 43,851 | 43851 | |
Power Factor "cosφ".
Power Factor
It is common to define the Power Factor - PF - as the cosine of the phase angle between voltage and current - or the "cosφ".
The power factor defined by IEEE and IEC is the ratio between the applied active (true) power - and theapparent power, and can in general be expressed as:
... | 4 | [
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... | 43,852 | 43852 | |
Does uniform convergence of the metrics imply uniform convergence of the radii of the smallest balls?
up vote 0 down vote favorite
Let $X$ be a countable set and $d_n,d$ locally finite metrics on $X$. Denote by $R_x^n$ (resp. $R_x$) the radius of the smallest closed ball in the metric $d_n$ (resp. $d$) about $x$ which... | 4 | [
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-0.10546875,
0.072265625,
-0.0... | 43,853 | 43853 | |
Smart elliptic curve rational point search given Reg*#Sha
up vote 8 down vote favorite
Hi folks,
Let E be a global minimal model of an elliptic curve over QQ, with a 2-torsion point which generates the torsion subgroup, and with Mordell-Weil rank 1 (under BSD). Let RegSha be equal to Regulator
(E)*#Sha(E) which has b... | 4 | [
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0.020751953125,
0.060791015625,
-0.047607421875,
-0.035888671875,
0.0... | 43,854 | 43854 | |
Counting Methods: Self Test
┌─────────────────────────────────────────┐
│ ┌─────────────────────────────────────┐ │
... | 4 | [
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Higher order multivariate automatic differentiation in Haskell.
I've started a game in Haskell. I've run into a couple of situations where I need derivatives of multivariate equations. It's embarrassing how long i stared at this,
Overloading Haskell numbers, part 2, Forward Automatic Differentiation.
and this
Non-st... | 5 | [
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0.06... | 43,856 | 43856 | |
-1 = 1 Proof ! What is the mistake done to prove it ?
January 10th 2013, 03:01 AM #1
Newbie
Joined
Jan 2013
From
Algeria
Posts
2
-1 = 1 Proof ! What is the mistake done to prove it ?
Untitled Page check out this picture !
i want to know what was the wrong step that guides us to -1=1 , thnx
Re: ... | 4 | [
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0.10107421875,
-0.0849609375,
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-0.07470703125,... | 43,857 | 43857 | |
An Introduction To System Dynamics - Second Order Linear Systems
An Introduction To System Dynamics - Second Order Systems
Introduction
Goals
The System
Impulse Response
Step Response
Problems
You are at Basic Concepts - Time Res... | 5 | [
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0... | 43,858 | 43858 | |
Modeling Algebraic
Modeling Algebraic Expressions Please e-mail your suggestions...Link to my other web site.
Math Models Home Page
... | 4 | [
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Sunday FunctionSunday Function
Sine, cosine, and tangent are of course the workhorse functions of trigonometry. You learn ‘em in high school, and if you go on in math and science you never stop using them. Now on many occasions
you might have the sine or cosine or tangent of some angle, and you want a way to invert tho... | 5 | [
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... | 43,860 | 43860 | |
Three Theorems About Growth
June 20, 2013
Is a key to polynomial versus exponential complexity lurking here?
Cropped from Abel Prize source
Mikhail Gromov is a French-Russian mathematician who has made and continues to make fundamental contributions to many areas of mathematics. In 2009 he was awarded the Abel P... | 4 | [
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eight-digits numbers...
Member
From: London
Registered: 2013-03-09
Posts: 602
Re: eight-digits numbers...
Administrator
From: Bumpkinland
Registered: 2009-04-12
Posts: 81,418
Re: eight-digits numbers...
Hi niharika_kumar;
You are correct, 120 is the answer.
The answer is done using... | 4 | [
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Right on the Left Coast: Views From a Conservative Teacher
Here was the problem on my last homework assignment in the Probability Theory class I'm taking:
Three identical fair coins are thrown simultaneously until all three show the same face. What is the probability that they are thrown more than three times?
W... | 5 | [
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how would you calculate m for continuos function f(x)?f(x)=x^2-2x+m, x=1 - Homework Help - eNotes.com
how would you calculate m for continuos function f(x)?
f(x)=x^2-2x+m, x=<1
f(x)=e^x-e, x>1
You need to remember the functions' continuity condition such that:
`lim_(x-gta,xlta)f(x)=lim_(x-gta,xgta)f(x)=f(a)`
The p... | 4 | [
0.026123046875,
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3 Tricky Calculus Problems. Help Please.
November 25th 2008, 06:11 PM #1
3 Tricky Calculus Problems. Help Please.
I can not get these three problems. I tried and tried but nothing makes sense. If someone could walk me through it and explain them to me I would be very grateful.
1)Let $p$ and $q$ be real numbe... | 4 | [
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0.034423828125,
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Hypergraph Chromatic Number vs Degree, Clique-Size
up vote 4 down vote favorite
For a hypergraph let $\chi$ be the least number of colours needed to colour the vertices, so that in each edge, each colour is used at most once (i.e., the strong chromatic number). Let $\Delta$ be
the maximum number of hyperedges containi... | 5 | [
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Area between two curves.
January 19th 2010, 03:09 AM #1
Newbie
Joined
Jan 2010
Posts
11
Area between two curves.
Hey
i hope this is the correct stop that i left this thread. its my last question for the day.
Find the exact area enclosed between the curve y = sin x and the line y = 1/2 for the d... | 5 | [
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0.00041961669921875,
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0.05029296875,
-0.0159912109375,
-0.03271... | 43,867 | 43867 | |
CORDIC FAQ
CORDIC is an iterative algorithm for calculating trig functions including sine, cosine, magnitude and phase. It is particularly suited to hardware implementations because it does not require any
multiplies.
1. Basics
1.1 What does "CORDIC" mean?
COordinate Rotation DIgital Computer. (Doesn't help muc... | 4 | [
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... | 43,868 | 43868 | |
Automedian Triangles and Magic Squares
Given any triangle with sides of lengths 2A, 2B, 2C, the lengths
of the medians to the midpoints of those sides, respectively, are
(M_A)^2 = - A^2 + 2B^2 + 2C^2
(M_B)^2 = 2A^2 - B^2 + 2C^2
(M_C)^2 = 2A^2 + 2B^2 - C^2
An "automedian triangl... | 4 | [
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0.0036... | 43,869 | 43869 | |
Differential equation and implicit mix- no idea
September 1st 2006, 07:02 PM #1
Junior Member
Joined
May 2006
Posts
37
Differential equation and implicit mix- no idea
a. Two quantities x and y are related to each other by the differential equation ydy/dx=-16x. Solve this equation to get an implicit equat... | 5 | [
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-0... | 43,870 | 43870 | |
Find the equation for the tangent plane to the surface. Answer doesn't seem right.
October 19th 2010, 03:52 PM
downthesun01
Find the equation for the tangent plane to the surface. Answer doesn't seem right.
$z=ln(3x^{2}+6y^{2}+1)$, $P(0,0,0)$
Ok, so I found $\frac{\partial f}{\partial x}$ and $\frac{\partia... | 4 | [
0.046142578125,
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-0.0625,
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0.0439453125,
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0.06494140625,
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0.0205078125,
-0.043701171875,
-0.01104736328125,
-0.1728515625,
-0.07958984... | 43,871 | 43871 | |
Find the point of intersection of the line and surface
May 3rd 2013, 10:24 AM #1
Member
Joined
Aug 2011
Posts
117
Find the point of intersection of the line and surface
I have an odd problem with no solution. I am completely lost on how to solve this.
Problem:
Find the coordinates of the point(... | 4 | [
-0.1083984375,
-0.025146484375,
0.009765625,
-0.0037689208984375,
0.01068115234375,
0.0211181640625,
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-0.0634765625,
-0.1113... | 43,872 | 43872 | |
Lost on Hard Substitution Indefinite Integral
April 11th 2009, 08:33 PM #1
Junior Member
Joined
Mar 2009
Posts
61
Lost on Hard Substitution Indefinite Integral
$\int ((x^2-1)e^{x^3-3x})dx$
dont know any rules for these type of problems involving e. Thanks for any help in getting me started with this... | 5 | [
-0.006256103515625,
0.0283203125,
0.03857421875,
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0.0139160... | 43,873 | 43873 | |
Please help with PDE in polar coordinates.
October 30th 2013, 09:04 AM #1
Junior Member
Joined
Jul 2013
From
Arizona
Posts
44
Thanks
2
Please help with PDE in polar coordinates.
For Polar coordinates, $r^2=x^2+y^2$ and $x=r\cos \theta$, $y=r\sin\theta$
$r^2=x^2+y^2\Rightarrow\; r\frac{\parti... | 5 | [
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Correlations among angular wave
PHYSICAL REVIEW E, VOLUME 65, 026614
Correlations among angular wave component amplitudes in elastic multiple-scattering random media
Brian G. Hoover,* Louis Deslauriers, Shawn M. Grannell, Rizwan E. Ahmed, David S. Dilworth, Brian D. Athey, and ... | 4 | [
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... | 43,875 | 43875 | |
Patent US6950099 - Approximation of Catmull-Clark subdivision surfaces by Bezier patches
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention is directed to approximating a Catmull Clark subdivision surface by Bezier patches.
2. Description of the Related Art
Subdivision surfaces are a known ... | 4 | [
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... | 43,876 | 43876 | |
CBSE : Physics: Gravitation Notes class 9th (IX)
IX Gravitation Extra scoring notes
Gravitation is a natural phenomenon by which objects with mass attract one another.
In everyday life, gravitation is most commonly thought of as the agency which lends weight to objects with mass.
It is responsible
for keeping the Eart... | 4 | [
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Motion in One Dimension Study Guide
By
Valentina Tobos | Laurentiu Tobos
Updated on Sep 26, 2011
Introduction
We start the article by defining the notions of displacement, velocity, speed, and acceleration, Then we look into graphical representation of motion as a way of describing the motion of an object or
parti... | 4 | [
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0.006072998046... | 43,878 | 43878 | |
-1^n = 1 or -1
September 5th 2012, 07:59 AM
kasper90
(-1)^n = 1 or -1
Okay, this might be a little bit stupid question...
I'm studying ross elementary analysis.
And I'm trying to get some skills in writing formal proofs, instead of intuitive ideas.
I want to proof that the sequence (-1)^n = 1 or -1.... | 4 | [
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... | 43,879 | 43879 | |
Fokker-Planck for Disordered Systems
Fokker-Planck for Disordered Systems
To get the cost of photovoltaic (PV) systems down, we will have to learn how to efficiently use crappy materials. By crap I mean that mass-produced PV materials will end up getting rolled or extruded
or organically grown. Unless we perfect the ... | 4 | [
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-0.008178710937... | 43,880 | 43880 | |
Parabola
How the parabola is used for focusing waves, studying motion, describing orbits, surveying and making bridges, and how to draw one
The Name
Parabola is, of course, from Greek, and refers to a particular plane curve. The word parabolh means a "comparison," literally "a throwing beside." The accent is on the ... | 4 | [
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-0.05... | 43,881 | 43881 | |
Programmable Error Correction Capability for BCH Codes
Patent application title: Programmable Error Correction Capability for BCH Codes
Sign up to receive free email alerts when patent applications with chosen keywords are published SIGN UP
Abstract:
An embo... | 4 | [
-0.1025390625,
0.0034027099609375,
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... | 43,882 | 43882 | |
fundamental infinity-groupoid of a locally infinity-connected (infinity,1)-topos
Context
$(\infty,1)$-Topos Theory
Background
Definitions
Characterization
Morphisms
Extra stuff, structure and property
Models
Constructions
structures in a cohesive (∞,1)-topos
Homotopy theory
Background
Variations
Definition... | 4 | [
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... | 43,883 | 43883 | |
On Polynomial Cointegration and the death of AGW
Well, I never thought I'd write a post with such a title. And I must confess that until about two weeks ago, these terms were very foreign to me. But recently, a
paper
by the econometricians Beenstock and Reingewertz has been circulating among sceptic blogs. It seems u... | 4 | [
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-0.... | 43,884 | 43884 | |
Calculus of variations
Lagrangian mechanics is based on the calculus of variations, which is the subject of optimization over a space of paths. One of the most famous variational problems involves constraining a particle
to travel along a curve (imagine that the particle slides along a frictionless track). The problem... | 5 | [
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School of Mathematics and Statistics
The unit sphere \( S^2 \) in three dimensions is the set of all points \( x \) in \( R^3 \) at distance \( |x| = 1 \) from the origin. Here we are considering just the surface of the sphere, not its
interior. In contrast to the circle, it is not possible to equally distribute points... | 4 | [
0.0159912109375,
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If the momentum of an object is doubled, by what factor will its kinetic energy change? - Homework Help - eNotes.com
If the momentum of an object is doubled, by what factor will its kinetic energy change?
KE = (P²)/(2m)
KE = Kinetic energy
P = Momentium
m = mass
If the momentum of the object is doubled then...
KE... | 4 | [
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What Do I Need To Pass This Class?
I admit a bit of difficulty in identifying with people who are very worried about their grades. I stopped worrying about my grades somewhere around fifth grade, when I missed a straight-A report card
by one question on one spelling test and decided the stress wasn’t worth it for chan... | 4 | [
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number theory problem...
Please help in finding the factor of ...618240007109027021 by the p-1 method... thanks a lot!
n = 618240007109027021 Select a bound for the factorial. bound = $\ln(n)$is an acceptable limit. In this case about 43 . The exponent will be 43! (factorial of 43) Choose some number to raise to that
... | 4 | [
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A quick contour integral.A quick contour integral.
Note to the reader: this post is relatively stiff mathematically. For those not mathematically inclined, I think you might enjoy reading it anyway and enjoying it as you would a tour of a widget
factory; even if you’re not worried about the details of the nuts and bolt... | 5 | [
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Random matrices: universality of local eigenvalue statistics
Van Vu and I have just uploaded to the arXiv our paper “Random matrices: universality of local eigenvalue statistics“, submitted to Acta Math.. This paper concerns the eigenvalues $\lambda_1(M_n) \
leq \ldots \leq \lambda_n(M_n)$ of a Wigner matrix $M_n = (\... | 4 | [
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Algebraic $p$-adic integers mod $p$
up vote 6 down vote favorite
1
In studying the papers of Abbes and Saito on ramification theory in the imperfect residue field case, I come to the following questions. Let $\overline{\mathbb{Q}}_p\supset\mathbb{Q}{}^{t}_p\supset \
mathbb{Q}{}^{nr}_p$ be an algebraic closure of the f... | 4 | [
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The Lost Luggage ProblemThe Lost Luggage Problem
Here’s a little brainteaser to think about if the Super Bowl ends up being a bit dull. Imagine that you are standing at the baggage carousel at an airport waiting for your bag. A percentage x of the
bags from your flight have already appeared on the carousel and yours is... | 5 | [
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An Introduction to Markov Decision Processes (PDF)
An Introduction to
Markov Decision Processes
Bob Givan Ron Parr
Purdue University Duke University
MDP Tutorial - 1
Outline
Markov Decisio... | 4 | [
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answer: coupon collector's problem
Go away and read about the coupon collector's problem, or what follows will make less than no sense.
OK, glad to have you back. What's the expected number of boxes of nutritious GlobalEvilCorp^TM breakfast cereal you have to buy in order to get at least one picture of each of the N E... | 5 | [
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W0RPK HAB Range
COMMUNICATIONS RANGE vs. PAYLOAD ALTITUDE and DISTANCE
Ralph Wallio, WØRPK WØRPK at netINS.net
As a high altitude balloon/payload gradually ascend... | 4 | [
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product topology preserves the Hausdorff property
product topology preserves the Hausdorff property
Proof. Let $Y=\prod_{{\alpha\in A}}X_{\alpha}$, and let $x,y$ be distinct points in $Y$. Then there is an index $\beta\in A$ such that $x(\beta)$ and $y(\beta)$ are distinct points in the Hausdorff
space $X_{\beta}$. I... | 5 | [
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Volume 36,
Volume 36, Issue 2, February 1995
•
View Description Hide Description
Operator‐theoretical analysis is made on (unbounded) representations, in Hilbert spaces, of a supersymmetry(SUSY)algebra coming from a supersymmetric quantum field theory in two‐dimensional
space–time. A basic idea for th... | 4 | [
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Image Processing 1 Objectives 2 Matlab ressources Language
School of Engineering and Physical Sciences Electrical Electronic and Computer Engineering
Image Processing
Matlab tutorial 2 MATLAB PROGRAMMING
1. Objectives:
Last week, we introduced you to the basic use of matlab as ... | 5 | [
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