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A Modified Three-Level Average Linear-Implicit Finite Difference Method for the Rosenau-Burgers Equation Advances in Mathematical Physics Volume 2014 (2014), Article ID 734067, 11 pages http://dx.doi.org/10.1155/2014/734067 Research Article A Modified Three-Level Average Linear-Implicit Finite Difference Method for t...
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HARRY_READ_ME.txt The HARRY_READ_ME.txt file Part 35j Back to precip, it seems the variability is too low. This points to a problem with the percentage anomaly routines. See earlier escapades - will the Curse of Tim never be lifted? A reminder. I started off using a 'conventional' calculation: absgrid(ilon(i),ila...
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Isolating a variable with a square root September 29th 2012, 01:58 PM #1 Newbie Joined Sep 2012 From Los Angeles Posts 11 Isolating a variable with a square root Having some trouble with this problem. I feel like I'm doing it incorrectly. Can someone show me how to do this step by step? $-{3}\sqr...
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Application of Wavelet Entropy to Predict Atrial Fibrillation Progression from the Surface ECG Computational and Mathematical Methods in Medicine Volume 2012 (2012), Article ID 245213, 9 pages http://dx.doi.org/10.1155/2012/245213 Research Article Application of Wavelet Entropy to Predict Atrial Fibrillation Progress...
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Local Analyticity in the Time and Space Variables and the Smoothing Effect for the Fifth-Order KdV-Type Equation Advances in Mathematical Physics Volumeย 2011ย (2011), Article IDย 238138, 39 pages http://dx.doi.org/10.1155/2011/238138 Research Article Local Analyticity in the Time and Space Variables and the Smoothin...
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coordinate geometry if one of the circles x^2+y^2+2g1x+c=0 and x^2+y^2+2g2x+c=0 lies within the other then prove that g1g2>0 and c>0 If $c\leqslant0$ then the point $(0,\sqrt{-c})$ lies on both circles. In that case, the circles intersect, so one of them cannot lie inside the other. Conclusion: c must be greater than ...
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A level maths 06 us drawing the diagram for you won't help, since we'd use a graphing utility and you won't know what happens. if you have any specific questions about graphing, just say so and i'll try to answer them. otherwise i'll find a from question 2 $y = (x - 1)^2 (x + a)$ Now we are told that the graph passes t...
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Trig Identity August 17th 2010, 07:13 PM #1 Newbie Joined Aug 2010 Posts 2 Trig Identity Tried all I could on this one. I think I'm making it out to be harder than it's supposed to be... (sec(x))/(sec(x)-tan(x))=sec^2(x)+sec(x)tan(x) Any help would be greatly appreciated. Hey, try expressi...
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RECURRENCE RELATIONS Beeler, M., Gosper, R.W., and Schroeppel, R. HAKMEM. MIT AI Memo 239, Feb. 29, 1972. Retyped and converted to html ('Web browser format) by Henry Baker, April, 1995. RECURRENCE RELATIONS Previous Up Next ITEM 12 (Gosper & Salamin): "the Fast Fibonacci Transform" (motivation for next item) Defi...
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Stochastic Inverse Identification of Nonlinear Roll Damping Moment of a Ship Moving at Nonzero-Forward Speeds Mathematical Problems in Engineering Volume 2012 (2012), Article ID 769385, 22 pages http://dx.doi.org/10.1155/2012/769385 Research Article Stochastic Inverse Identification of Nonlinear Roll Damping Moment o...
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Impulsive Problems for Fractional Differential Equations with Nonlocal Boundary Value Conditions Abstract and Applied Analysis Volume 2014 (2014), Article ID 510808, 13 pages http://dx.doi.org/10.1155/2014/510808 Research Article Impulsive Problems for Fractional Differential Equations with Nonlocal Boundary Value Co...
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Exact value of sin sin(-7pi/12) = -sin(7pi/12) = -sin(pi/4 +pi/3) = -[sin(pi/4)cos(pi/3) +cos(pi/4)sin(pi/3)] = -[(1/sqrt(2))(1/2) +(1/sqrt(2))(sqrt(3)/2)] = -[1 /2sqrt(2) +sqrt(3) /2sqrt(2)] = -(sqrt(2) /4)(1 +sqrt (3)) -----answer. or, = -(1/4)[sqrt(2) +sqrt(6)] ---------answer also
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A New Simultaneous Identification of the Harmonic Excitations and Nonlinear Damping of Forced Damped Nonlinear Oscillations: A Parametric Approach Journal of Applied Mathematics Volume 2013 (2013), Article ID 754576, 7 pages http://dx.doi.org/10.1155/2013/754576 Research Article A New Simultaneous Identification of t...
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Implicit Factoring with Shared Most Significant and Middle Bits. Conference Paper Implicit Factoring with Shared Most Significant and Middle Bits. DOI: 10.1007/978-3-642-13013-7_5 In proceeding of: Public Key Cryptography - PKC 2010, 13th International Conference on Practice and Theory in Public Key Cryptography, Par...
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Period doubling bifurcations cascade Remember (see Birth of attracting period 2 orbit), that for c < c[1] = -3/4 the "left" fixed point's multiplier λ[1] = 1 - (1 - 4c)^1/2 < -1 so this point becomes repelling too. We get into attracting period-2 cycle z[1] -> z[2] -> z[1] ... (the "red square" on this image). dra...
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solid mensuration January 15th 2014, 02:15 AM #1 hello everyone ..I'm new here and i wanna ask some help...if its ok with you.. I'm having an assignment today and it really gives me a hard time answering this problem,... "A cylindrical tin can holding 2 gal. has its height equal to the diameter of it...
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Finding tanget line to a graph at given point March 1st 2008, 03:54 PM #1 Newbie Joined Mar 2008 Posts 5 Finding tanget line to a graph at given point Find the equation of the tangent line to the graph of the given function at the given value of x, F(x)=((x^2)+28)^(4/5), x=2 $f(x) = (x^2 + 28)^{...
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Matching dice March 18th 2009, 05:42 PM #1 Newbie Joined Mar 2009 Posts 3 Matching dice Each member of a group of 4 players rolls a die. For any pair of players who throw the same number, the groups scores 1 point. Find the possible values of x and the associated probabilities. *Note: 6cx is for the...
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Find the directional derivative of f at the given angle March 8th 2009, 01:57 PM acg716 Find the directional derivative of f at the given angle Find the directional derivative of f at the given point in the direction indicated by the angle θ. f(x, y) = x sin(xy), (3, 0), θ = π/4 March 8th 2009, 03:59 PM th...
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Trig application question -- Help February 4th 2010, 04:21 PM #1 Newbie Joined Sep 2009 Posts 13 Trig application question -- Help From a position 110km northwest of a coast guard station, an oil tanker makes radio contact with the coast guard. The tanker is traveling due south at 25km/h. The radar ...
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Solving a polynomial with complex numbers Can I get help with this question? z^6 + (i+1)z^3 + i =0 let w = z3, and use the quadratic formula to solve for w. then find the cube roots of w (there will be 3 for each solution you find for w, use demoivre). How do I use the quadratic formula on w^2 + (i +1)w+ i? Would it ...
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FY 2013 Fair Market Rent Documentation System FY 2013 Fair Market Rent Documentation System The Final FY 2013 Great Falls, MT MSA FMRs for All Bedroom Sizes The following table shows the Final FY 2013 FMRs by unit bedrooms for Great Falls, MT MSA. FY 2013 FMR areas continue to use the revised Office of Management...
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Splitting field September 2nd 2009, 11:07 PM #1 Member Joined Jul 2009 Posts 111 Thanks 1 I was working on a problem to find the degree of the splitting field of the polynomial x^3-11 over Q I figured out to some extent. x^3-11 =0 has roots r*1,r*w,r*w^2 as roots where r is the cubic root of 11; ...
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Just a matter of rigor August 28th 2010, 02:59 AM #1 Newbie Joined Aug 2010 Posts 9 Just a matter of rigor My teacher really takes account about the rigor of a proof. The following is the proposition and a proof given by myself. Can someone please check it whether it is rigorous enough? Proposition:...
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Contour Integral - I've done it but not sure if i'm correct. August 30th 2012, 08:52 PM #1 Member Joined Sep 2010 Posts 149 Thanks 3 Contour Integral - I've done it but not sure if i'm correct. Compute $\int_C \bar{z} dz$ where C is the circle $|z|=2$ traversed three times, clockwise. ok, so jus...
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u substitution help -- lots of e^x April 5th 2012, 08:31 PM #1 Newbie Joined Apr 2012 From canada Posts 2 hi there, I need help solving the following problem using U-substitution: any idea what I should set my u variable equal to? any help would be greatly appreciated thanks so muc...
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Math Help January 25th 2009, 02:32 PM #1 Newbie Joined Oct 2008 Posts 19 Exponents (2t^3/5t^-4)^-2 I need help in this problem It asks to simplify the exponent but the catch is the answer must be positive exponents ant help will be appreciated greatly Can you explain further. thnks tho La...
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diophantine equation February 28th 2011, 04:07 AM #1 Newbie Joined Jan 2011 Posts 12 diophantine equation I have to show that the Diophantine eqn. x^2 + 10y^2 = 2z^2 has no solutions first i let x,y,z be a solution then i got x^2 is congruent to 0 (mod 2) but i don't know how this hel...
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Gamma Function Problems January 24th 2010, 01:09 PM #1 Newbie Joined Jan 2010 Posts 4 Gamma Function Problems Hi, I am having trouble with problems from the following book: Mathematical Methods in the Physical Sciences, Third Edition, Mary L. Boas. Specifically, I am looking at problem 11.3.8 and 11....
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Bridge hand distribution: simulation vs exact calculation December 8, 2012 By Bogumił Kamiński Recently I played bridge with my friends. Being frustrated with several consecutive poor hand distributions we asked ourselves a question what is the probability of having a hand good enough for a small slam. A well known...
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CMS Summer 2003 Meeting Computational and Analytical Techniques in Modern Applications / Techniques numériques et analytiques dans les applications modernes (Org: Peter Minev) Around ...
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Convergence of a Proximal Point Algorithm for Solving Minimization Problems Journal of Applied Mathematics Volume 2012 (2012), Article ID 142862, 13 pages http://dx.doi.org/10.1155/2012/142862 Research Article Convergence of a Proximal Point Algorithm for Solving Minimization Problems ^1Department of Mathematics, Pr...
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Risk Measurement for Portfolio Credit Risk Based on a Mixed Poisson Model Discrete Dynamics in Nature and Society Volume 2014 (2014), Article ID 597814, 9 pages http://dx.doi.org/10.1155/2014/597814 Research Article Risk Measurement for Portfolio Credit Risk Based on a Mixed Poisson Model ^1School of Finance, Zhejia...
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When Does An Inverse Function Exist? August 25th 2009, 10:36 AM saberteeth When Does An Inverse Function Exist? I have understood that an inverse of a function exists when the relation is one to one. It is clear to understand when the function is a whole number. But how do you apply that rule to an equation?...
4
[ -0.07470703125, -0.021728515625, 0.0267333984375, 0.058349609375, -0.017822265625, -0.06494140625, -0.0181884765625, 0.0220947265625, 0.0498046875, 0.03564453125, 0.0277099609375, -0.03857421875, 0.019775390625, -0.028076171875, -0.024658203125, 0.0380859375, -0.0478515625, -0.0463...
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Irrational euqations!!! January 15th 2007, 01:01 PM #1 Newbie Joined Jan 2007 Posts 6 Irrational euqations!!! I tried to solve those euqations but made errors. Could you please solve those irrational euqations! ____ __ √4x+9 - 2√x = 1 ____ ____ √3x+4+ √x-3 = 5 I tried to write that...
4
[ 0.0185546875, -0.0242919921875, 0.0966796875, 0.03515625, -0.01611328125, 0.038818359375, 0.017333984375, -0.032958984375, -0.0048828125, -0.034423828125, 0.02392578125, -0.032958984375, 0.09228515625, 0.0439453125, -0.0242919921875, 0.0213623046875, -0.0703125, 0.06640625, -0.07...
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Nonlinear Model-Based Method for Clustering Periodically Expressed Genes TheScientificWorldJOURNAL Volume 11 (2011), Pages 2051-2061 http://dx.doi.org/10.1100/2011/520498 Research Article Nonlinear Model-Based Method for Clustering Periodically Expressed Genes ^1School of Information, Beijing Wuzi University, No.1 F...
4
[ -0.11669921875, -0.09619140625, 0.040283203125, 0.0556640625, -0.0311279296875, 0.0185546875, -0.03955078125, -0.0260009765625, 0.0274658203125, -0.031005859375, 0.0218505859375, -0.001190185546875, 0.0162353515625, 0.05224609375, -0.049560546875, 0.00543212890625, -0.08349609375, ...
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Finding angular speed August 31st 2009, 06:20 PM #1 Junior Member Joined Jul 2009 Posts 35 Finding angular speed The pedal sprocket has a radius of 4 in. the wheel sprocket a radius of 2 in. and the wheel a radius of 13 in. The cyclist pedals at 40 rpm. a. Find the angular speed of the wheel spro...
4
[ 0.0177001953125, 0.0546875, -0.041748046875, -0.0751953125, -0.0400390625, 0.00860595703125, -0.06884765625, 0.07421875, 0.044189453125, -0.00323486328125, 0.1533203125, -0.01116943359375, 0.060546875, 0.00189208984375, 0.01116943359375, 0.05517578125, -0.06591796875, 0.04760742187...
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Complex Trig Function April 8th 2010, 03:48 PM #1 Member Joined Aug 2008 Posts 88 Complex Trig Function Show that $\overline{sin(iz)}=sin(i\bar{z})$ if and only if $z=n \pi i, (n=0, \pm 1, \pm 2, ...)$. Anyways, I got from the LHS to the RHS but didn't find the restriction. Where should that pop up?...
5
[ -0.1396484375, 0.054931640625, 0.002044677734375, 0.033203125, -0.00604248046875, 0.0111083984375, 0.0234375, -0.0037078857421875, 0.0086669921875, -0.005859375, 0.059814453125, -0.03564453125, 0.046875, 0.0299072265625, 0.05029296875, -0.0458984375, 0.00921630859375, -0.0480957031...
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[SOLVED] help on proof! June 6th 2005, 10:19 AM #1 mezb Guest [SOLVED] help on proof! i need to prove this as many ways possible, and i need some new approaches... BC is the diameter of a circle with a center O. A is a point on the circle. OE and OD bisect chords AB and AC. Prove OE is perpendicu...
4
[ -0.056396484375, 0.060546875, -0.07958984375, -0.0291748046875, 0.0091552734375, -0.06298828125, 0.031494140625, 0.095703125, 0.103515625, -0.00994873046875, 0.031005859375, -0.058837890625, 0.039794921875, 0.015380859375, -0.037109375, 0.02587890625, -0.00390625, -0.0146484375, ...
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the encyclopedic entry of dicyclic In group theory , a dicyclic group is a member of a class of groups Dic [n] ( n > 1), a non-abelian group of order 4 n , which is an extension of the cyclic group of order 2 by a cyclic group (of even order $2n$ ), giving the name di-cyclic : $1 to C_\left\{2n...
4
[ -0.13671875, 0.009521484375, 0.00022125244140625, 0.06591796875, -0.08837890625, -0.0888671875, -0.005462646484375, 0.0137939453125, 0.05224609375, -0.06494140625, 0.03173828125, -0.06640625, 0.03125, -0.01348876953125, 0.0029144287109375, 0.03466796875, -0.06640625, 0.0703125, -...
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Finding closest point on line to a point February 2nd 2010, 11:24 AM #1 Newbie Joined Feb 2010 Posts 2 Finding closest point on line to a point I have been going bonkers trying to figure out what I'm doing wrong. I am using the proper formula to get the point on a segment which is tangent (close...
5
[ -0.07861328125, 0.023193359375, -0.04296875, -0.07470703125, -0.0025177001953125, 0.03857421875, 0.0169677734375, 0.09814453125, 0.022216796875, -0.004913330078125, 0.0478515625, -0.048583984375, 0.04638671875, 0.043701171875, -0.022216796875, 0.11181640625, -0.02197265625, -0.0722...
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Approximating sqrt(a+b) May 13th 2008, 06:13 AM #1 Newbie Joined May 2008 Posts 5 Approximating sqrt(a+b) Hello, I am trying to approximate $sqrt(a+b) = f(a) + g(b) + c$ I need to get a and b out of the square root to solve explicitly for them (it can be only an approximation). Thanks...
5
[ -0.050048828125, -0.041748046875, 0.0203857421875, -0.009033203125, -0.06884765625, 0.01806640625, -0.09521484375, -0.04052734375, 0.0027008056640625, 0.043212890625, -0.0113525390625, 0.02734375, -0.018310546875, 0.000823974609375, -0.0179443359375, 0.10205078125, 0.025146484375, ...
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Solve and Interval Notation: 1 < 4x + 3 < 9 Can anyone help me understand this problem? I need to solve and apply interval notation. 1 < 4x + 3 < 9 Tiger wrote:Can anyone help me understand this problem? I need to solve and apply interval notation. 1 < 4x + 3 < 9 How would you solve "4x + 3 = 9"? How a...
4
[ 0.019775390625, 0.0224609375, 0.0673828125, -0.05419921875, -0.07958984375, 0.0125732421875, -0.0595703125, 0.061279296875, -0.00628662109375, -0.07373046875, -0.038818359375, -0.03466796875, 0.056640625, 0.003631591796875, 0.0341796875, 0.012451171875, 0.005096435546875, -0.043701...
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solve limit with high powers No, you could also expand everything, then divide top and bottom by the highest power of $x$. The limit will be $\left(\frac{3}{2}\right)^{20}$. To see that notice that $(3x-1)^{20}=3^{20}x^{20}\left(1-\frac{1}{3x}\right)^{20}$. I did it in a different, longer way. (3x-1)^20 = ((3x-1)²)^1...
5
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Questions on Development of Brownian motion September 20th 2008, 12:03 PM #1 Questions on Development of Brownian motion I have been away from MHF for quite some time due to how busy my life has been due to work, personal life changes (house, job) and of course, my actuarial exams (in November). I will not i...
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[ -0.07373046875, -0.115234375, 0.0693359375, 0.0211181640625, 0.04443359375, 0.025146484375, -0.0181884765625, -0.0322265625, 0.051025390625, 0.0458984375, 0.006988525390625, 0.091796875, -0.048828125, -0.052001953125, -0.0654296875, -0.007720947265625, 0.009521484375, -0.076171875,...
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Fraction Change in Angular Momentum of Cone Full of sand compared with half full. 1. A light, hollow cone is filled with sand set spinning about a vertical axis through its apex on a frictionless bearing. Sand is allowed to drain slowly through a hole in the apex. Calculate the fractional change in angular velocity whe...
4
[ -0.01031494140625, 0.0059814453125, 0.06884765625, 0.00933837890625, 0.07080078125, -0.0703125, -0.0140380859375, 0.0181884765625, 0.0130615234375, 0.05224609375, 0.003509521484375, -0.015869140625, -0.020751953125, 0.0031890869140625, 0.00799560546875, 0.0908203125, -0.046142578125,...
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Convergence of the series 1 / n(n+2) October 12th 2012, 10:39 AM #1 Newbie Joined Oct 2012 From Montréal Posts 14 Convergence of the series 1 / n(n+2) Hi, I'm just about to hit my head on a table or a wall... I have to determine if the series (sum symbol) (n=1 to infinity) 1 / n(n+2) is con...
5
[ -0.042724609375, -0.0159912109375, -0.005950927734375, -0.0017242431640625, -0.006683349609375, 0.005615234375, -0.05810546875, 0.01904296875, 0.055908203125, -0.04150390625, -0.0703125, 0.001007080078125, 0.0086669921875, 0.0478515625, -0.01251220703125, -0.07861328125, 0.06640625, ...
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Solving for X April 1st 2010, 05:00 AM #1 Super Member Joined Dec 2009 Posts 755 Solving for X Given the curve $y=1-2cos^2x+cosx$ for $0<x<2\pi$. Calculate the values of x for which the curve meets the x-axis. I don't know where I went wrong but this is my attempt, textbook answer is $x=\frac{4\pi}{...
4
[ -0.01165771484375, -0.029052734375, -0.0277099609375, -0.0035552978515625, -0.059326171875, 0.045654296875, -0.019287109375, 0.054931640625, 0.048095703125, -0.004547119140625, 0.0947265625, -0.026123046875, -0.00701904296875, 0.035400390625, -0.0284423828125, 0.006317138671875, -0.0...
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Spectral Analysis of Surface Wave for Empirical Elastic Design of Anchored Foundations Advances in Civil Engineering Volume 2012 (2012), Article ID 635257, 10 pages http://dx.doi.org/10.1155/2012/635257 Research Article Spectral Analysis of Surface Wave for Empirical Elastic Design of Anchored Foundations ^1Departme...
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[ -0.0537109375, 0.09375, 0.059814453125, 0.02392578125, 0.030029296875, -0.0206298828125, -0.038330078125, 0.0517578125, -0.0301513671875, 0.033935546875, -0.0888671875, -0.00396728515625, 0.00689697265625, -0.0262451171875, 0.017822265625, 0.050537109375, -0.06103515625, -0.0150756...
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Bifurcation Analysis for Phage Lambda with Binding Energy Uncertainty Computational Biology Journal Volume 2014 (2014), Article ID 465216, 11 pages http://dx.doi.org/10.1155/2014/465216 Research Article Bifurcation Analysis for Phage Lambda with Binding Energy Uncertainty ^1Joint Institute of UMich-SJTU, Shanghai Ji...
4
[ -0.0230712890625, 0.00421142578125, 0.01806640625, -0.00360107421875, -0.08935546875, -0.062255859375, 0.01409912109375, 0.053955078125, 0.1123046875, 0.027099609375, 0.0194091796875, 0.01495361328125, 0.03759765625, 0.031494140625, -0.02783203125, 0.050048828125, -0.053955078125, ...
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Transformation to uv plane integral, Carnot engine May 19th 2013, 07:42 PM #1 Member Joined Aug 2011 Posts 84 Transformation to uv plane integral, Carnot engine I'm curious how do you choose the u and v transformations here to be equal to the constants and why is the f(u,v)=1 for the area? I see that the...
5
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Limit Problem - # 3 October 30th 2013, 08:51 PM #1 Member Joined Oct 2012 From USA Posts 213 Thanks 1 Limit Problem - # 3 $\lim x \rightarrow 0^{+}[\sin x \ln 2x]$ $\lim x \rightarrow 0^{+}[\sin (0) \ln 2(0)]$ $\lim x \rightarrow 0^{+}[(0)( \ln 0)]$ $\lim x \rightarrow 0^{+}[(0)( -...
4
[ -0.0634765625, -0.006927490234375, 0.0185546875, 0.0439453125, 0.095703125, -0.00909423828125, 0.01953125, -0.0147705078125, 0.000011146068572998047, 0.0419921875, 0.08056640625, -0.06982421875, -0.0004673004150390625, 0.08056640625, 0.016845703125, 0.07421875, -0.037109375, -0.020...
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Related Rates 4 October 8th 2007, 03:22 AM #1 Junior Member Joined Oct 2007 Posts 40 Related Rates 4 4) You are videotaping a race from a stand 123 feet away from the track, following a car that is moviing at 180 mi/h (264 ft/sec). How fast will your camera angle theta be changing when the car is rig...
5
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A Low Complexity Near-Optimal MIMO Antenna Subset Selection Algorithm for Capacity Maximisation International Journal of Antennas and Propagation Volume 2013 (2013), Article ID 956756, 11 pages http://dx.doi.org/10.1155/2013/956756 Research Article A Low Complexity Near-Optimal MIMO Antenna Subset Selection Algorithm...
4
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Periodic Solutions for Second Order Hamiltonian Systems with Impulses via the Local Linking Theorem Abstract and Applied Analysis Volume 2014 (2014), Article ID 250870, 7 pages http://dx.doi.org/10.1155/2014/250870 Research Article Periodic Solutions for Second Order Hamiltonian Systems with Impulses via the Local Li...
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Solvability of Nonlocal Fractional Boundary Value Problems Discrete Dynamics in Nature and Society Volume 2013 (2013), Article ID 943961, 9 pages http://dx.doi.org/10.1155/2013/943961 Research Article Solvability of Nonlocal Fractional Boundary Value Problems Department of Mathematics, Yanbian University, Yanji 1330...
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[ -0.0703125, 0.033935546875, 0.00555419921875, 0.044677734375, 0.04931640625, 0.0023040771484375, 0.022216796875, -0.026611328125, 0.068359375, -0.053466796875, 0.01116943359375, -0.08056640625, -0.03466796875, 0.04052734375, 0.04736328125, -0.0235595703125, 0.000701904296875, -0.03...
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Uniform Decay of Solutions for a Nonlinear Viscoelastic Wave Equation with Boundary Dissipation Journal of Function Spaces and Applications Volume 2012 (2012), Article ID 421847, 17 pages http://dx.doi.org/10.1155/2012/421847 Research Article Uniform Decay of Solutions for a Nonlinear Viscoelastic Wave Equation with ...
4
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How to find this integral February 7th 2008, 07:53 PM snoboarder2k6 How to find this integral Yeah, so I can't figure out how to find the integral with respect to x of the following cos(x) / (1 + x). how would I do this? thanks for any help February 7th 2008, 08:12 PM mr fantastic February 7th ...
5
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Quadratic Program (QP) Problem Definition An QP has the following form: Where H is a n x n sparse matrix (quadratic and bilinear terms) and f is a n x 1 vector (linear terms) containing the quadratic objective function, which is subject to the following constraints: Linear Inequalities* A is a m x n sparse matrix, ...
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Gaussian elimination help June 28th 2011, 12:07 PM #1 Newbie Joined Jun 2011 Posts 13 Question:The spanning set [(2,2,1), (4,1,0), (2,-1,-1), (2,0,1)] of R3 is not independent. Explain why, and identify a maximal independent set among these vectors. --------------------------------...
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Liminf to limsup November 19th 2009, 08:40 AM #1 Super Member Joined Mar 2006 Posts 705 Thanks 2 Liminf to limsup Suppose that $\mid f_n \mid \leq g \in L^1$ and $f_n \rightarrow f$ in measure. Then $\int f = \lim \int f_n$. Proof so far. Now, $g- f_n \geq 0$ and $f_n -g \geq 0$. ...
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How to: Use Stochastic Programming to Solve Two-Stage Linear Models You can use linear programming to minimize or maximize functions, and also account for fluctuating demand by using random parameters and recourse decisions. In this example, an oil refinery must procure crude oil from two sources. The objective is to ...
5
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Math: Algebra Posted by Matt on Wednesday, February 1, 2012 at 1:38pm. Landon can climb a certain hill at a rate that is 2.5 mph slower than his rate coming down the hill. If it takes him 6 hours to climb the hill and 45 minutes to come down the hill, what is his rate coming down? • Math: Algebra - Steve, Wednesday...
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[SOLVED] The definition of derivative Anyone know how to find the derivative using 5x^3+2 lim x->c $<br /> \frac {f(x)-f(c)}{x-c}<br />$ We are given: $f(x) = 5x^3 + 2$ $\lim_{x \to c} \frac{{\color{red}f(x)} - {\color{blue}f(c)}}{x - c}$ $= \lim_{x \to c} \frac{{\color{red}(5x^3 + 2)} - {\color{blue}(5c^3 + 2)}}{x - ...
5
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Solution required urgently June 19th 2006, 10:17 AM #1 Newbie Joined Jun 2006 Posts 22 Solution required urgently Hi, □ Find x from each of the following equations. 1.1)x*tan^2(45)*cos(60) = sin(60)*cot(30) 1.2)(1+x)*tan(45)*cosec^2(45) = sin(30)*sec^2(45) 1.3)X*cos(60)–sin(30) = ...
4
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Polynomial story problem. January 12th 2007, 12:00 AM #1 Newbie Joined Jan 2007 Posts 11 Polynomial story problem. Set up a polynomial equation and solve it in order to answer the question: A rectangular parcel of land is 50ft. wide. The length of a diagonal between opposite corners is 10ft. more th...
4
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Verifying that Uniform and Pareto distributions are probability densities June 8th 2010, 06:38 PM #1 Senior Member Joined Feb 2008 Posts 297 Verifying that Uniform and Pareto distributions are probability densities Show that the following functions are probability densities, i.e. $f(x)\geq 0$ and $\...
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Calculus (Minimizing Volume) Date: 5/13/96 at 21:40:26 From: Anonymous Subject: Calculus (minimizing volume) The arch y=sin x,0 less than or = to x less than or = to pi, is revolved around the line y=c to generate a solid. Find the value of c that minimizes the volume. What is the minimum volume? I've tried inte...
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complex inverse trig October 29th 2008, 06:21 PM #1 complex inverse trig let $\sin(z) = 3$ what is $z$ equally to? $\arcsin(z) = -i\log[i z+\sqrt{1-z^2}]$ substituting z for 3 I get $\arcsin(3) = -i\log[i 3+\sqrt{-8}]$ I'm trying to get it into the form $\ln|x| +(x+2n)\pi i$ but what I'm ...
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Time-Domain Joint Parameter Estimation of Chirp Signal Based on SVR Mathematical Problems in Engineering Volume 2013 (2013), Article ID 952743, 9 pages http://dx.doi.org/10.1155/2013/952743 Research Article Time-Domain Joint Parameter Estimation of Chirp Signal Based on SVR Zhengzhou Information Science and Technolo...
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summar R provides a variety of methods for summarising data in tabular and other forms. • Before you do anything else, it is important to understand the structure of your data and that of any objects derived from it. A <- data.frame(a=LETTERS[1:10], x=1:10) class(A) # "data.frame" sapply(A, cl...
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Learn about Senior Chemistry: Acids and Bases 6 Rob Lederer: Sometimes you can't just regard X when you are trying to find the concentration of hydronium in these questions. So, when you can't do that, you need to be able to use the quadratic formula. Now, I will take you through the steps and show you the mathematics ...
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Having an issue with a seemingly simple integration with trig. May 31st 2010, 05:06 PM charleschafsky Having an issue with a seemingly simple integration with trig. I have the integral from 0 to pi of sin^4(3x)dx. This should be really easy, and I can see that I probably need to use the half angle trig iden...
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Flip a weighted coin n times, flip again another n times October 4th 2012, 01:34 PM datanewb Flip a weighted coin n times, flip again another n times How can I compute the probability that each set of n flips resulted in the same number of heads? I've spent the last hour coming up with the general formula b...
4
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Diagonalization, soluton check December 13th 2009, 02:44 PM #1 Newbie Joined Dec 2009 Posts 4 Diagonalization, soluton check Was just wondering if I did this problem correctly Diagonalize the matrix B 3 0 0 1 2 0 1 −1 4 That is, find matrices P and D so that D is diagonal and P(i...
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Hey gues find equation of parabola with given properties. Also a hyperbola question. April 29th 2009, 07:36 PM #1 Newbie Joined Apr 2009 Posts 1 Hey gues find equation of parabola with given properties. Also a hyperbola question. Hey guys I have a question I've been stuck on. The problem says Find ...
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find the solution... April 9th 2011, 12:13 PM #1 Senior Member Joined Aug 2009 Posts 349 find the solution... ok im not sure how to start this problem.... $(1-x^{2})y''-2xy'+90y=0$ the term in front of the y'' is messing me up...any thoughts? anybody? thanks in advance This is the Legendre...
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Calculation of Thermal Pressure Coefficient of Lithium Fluid by ISRN Physical Chemistry Volume 2012 (2012), Article ID 724230, 11 pages http://dx.doi.org/10.5402/2012/724230 Research Article Calculation of Thermal Pressure Coefficient of Lithium Fluid by Data Department of Chemistry, Payame Noor University, P.O. Bo...
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Scalar Equation of a Plane March 25th 2008, 07:49 PM #1 Member Joined Nov 2007 Posts 232 Scalar Equation of a Plane Please show me step by step solution!!! Question 1: Determine whether the following pairs of planes are coincident, parallel and distinct or neither. a) $x + 3y - z - 2 = 0$ ...
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Trig. segmet area+perimiter March 16th 2010, 03:19 AM #1 Newbie Joined Mar 2010 Posts 7 Trig. segmet area+perimiter Hi again, i'm currently studying for my pure maths intermediate level exam and i need some help with a trigonometry question please: ------------- The points A and B lie on the ci...
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det(A) where A is 3x3 matrix November 26th 2011, 01:01 PM #1 Junior Member Joined Apr 2010 Posts 58 det(A) where A is 3x3 matrix [SOLVED] If A is 3x3 with all entries 1's and 0's, what is the max value of det(A)? I answered it to be 1, which is wrong. Can someone help me? Thanks! Last edit...
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the encyclopedic entry of presention In mathematics , especially in the area of abstract algebra known as combinatorial group theory , the word problem for a recursively presented group G is the algorithmic problem of deciding whether two words represent the same element. Although it is common to speak of t...
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mathematica result problem November 20th 2010, 08:12 AM yosso mathematica result problem Hi. I have following problem: In some calculations I use an interpolation such like this: li=Interpolation[{{0,0},{1,1},{2,2},{3,3},{4,4},{5,5},{6,6},{7,5},{ 8,4},{9,3},{10,2},{11,1},{12,0}},PeriodicInterpola t...
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Proving adj(a^trace)=[adj(a)]^trace? September 24th 2009, 10:40 AM forensic91 Proving adj(a^trace)=[adj(a)]^trace? Hello, I had 3 homework problems that I am having trouble with. I really have problems when it comes to proving things. Here goes Assume A is an n x n invertible matrix. Prove the following ide...
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right triangle trig August 1st 2010, 04:32 PM gabriel right triangle trig ok so in this problem.. i am told to solve for all sides and angles in the right triangle so the bottom side of the triangle is 6.2 in length and all the other sides are unknown in angles the the triangle is a right triangl...
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Commutator, Abelian May 14th 2009, 07:59 PM #1 Newbie Joined Mar 2009 Posts 6 Commutator, Abelian A commutator in a group is any element $[x, y]=xyx^{-1}y^{-1}$ for $x, y \in G$. If $K$ is subgroup of $G$, prove $K$ contains all the commutators of $G$ iff $K \triangleleft G$ and $G/K$ is abelian. ...
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A Complicated Integral January 17th 2011, 04:59 PM PPSSAGW A Complicated Integral $d/dx \int_3^{x^2} (2t^2+5)^2 dx$ Can someone please see if I did it right or not? $x^2=2x$ Substitute $t$ with $x^2$ $(2(x^2)^2+5)^2$ $<br /> 2x(2x^4+5)^2$ Do I have to add +C? Thanks a lot Janu...
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Matrix Package Doodling November 24, 2011 By DomPazz Trying not to fall into Thanksgiving Day, football, coma. So I started looking at the Matrix package. Started out by changing my code from before to create a matrix using the Matrix() function from the Matrix package. n = 4000 c = Matrix(.9,n,n) for(...
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Inequality bsaikrishna wrote: Solve the inequality: sqrt(2x+3) > x link to the source (example 5 in http://openlearn.open.ac.uk/mod/oucontent/view.php?id=398420&section=2.2) I have done it as follows: Leg1: => sqrt(2x+3) > x => 2x+3 > x^2 => x^2 -2x -3 < 0 => -1< x < 3 Leg 2: 2x+3 has to be positive => 2x+3 ...
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Homework Help Posted by suzy on Tuesday, November 30, 2010 at 6:14pm. a regular hexagon is inscribed in a circle. The radius of the circle is 18 units. What is the area of the region bounded by the inside of the circle and the outside of the hexagon. Round your answer to the nearest hundredth. • geometry - Reiny, T...
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-Matrices Involving Hadamard Products Algebra Volume 2013 (2013), Article ID 102438, 4 pages http://dx.doi.org/10.1155/2013/102438 Research Article Bound on the Minimum Eigenvalue of -Matrices Involving Hadamard Products ^1School of Finance, Shanghai University of Finance and Economics, Shanghai 200433, China ^2Depa...
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Finding integer roots of quadratic December 19th 2009, 08:47 PM stevek Finding integer roots of quadratic Hi all, I have a bit of a unique problem that I'm hoping someone amongst you may have some suggestions on how to obtain a short cut to the answer. Essentially, I have a list of quadratics that were...
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Brazilian Journal of Physics Services on Demand Article Indicators Related links Share Print version ISSN 0103-9733 Braz. J. Phys. vol.30 no.4 São Paulo Dec. 2000 http://dx.doi.org/10.1590/S0103-97332000000400007  Damage spreading in the one-di...
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Relations January 28th 2011, 08:59 AM gutnedawg Relations Prove: $R\circ (S\cap T)\subseteq R \circ S \cap R \circ T$ and an example where inclusion is strict $R \circ S\cap T \subseteq R\circ (S\cap R^-^1 \circ T)$ and an example where inclusion is strict I'm not understanding the compo...
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the encyclopedic entry of aerodynamic lift In the context of a fluid flow relative to a body, the lift force is the component of the aerodynamic force that is perpendicular to the flow direction. It contrasts with the drag force, which is the parallel component of the aerodynamic force. Lift is commonly ...
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If t is a positive integer and r is the remainder when Author Message TAGS: If t is a positive integer and r is the remainder when [#permalink] 11 Jul 2009, 17:38 1 ...
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The Fundamental Counting Principle January 10th 2013, 10:42 PM #1 Newbie Joined Dec 2012 From canada Posts 13 The Fundamental Counting Princip le 1) In how many different ways can the letters of the word GREAT be rearranged if the new arrangement must begin with a T and repetitions are not allo...
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Revista Brasileira de Zootecnia Servicios Personalizados Articulo Indicadores Links relacionados Compartir versión On-line ISSN 1806-9290 R. Bras. Zootec. vol.41 no.5 Viçosa mayo 2012 http://dx.doi.org/10.1590/S1516-35982012000500011  ...
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Extension fields Hurkyl Have you thought at all about how this statement might imply what morphism said? So, the only thing that you need to prove is that this intermediate field E is a finite extension of F and finitely extends to K. Let's do the former first. We want to show that E is finite dimensional as a vec...
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Maximum profit - Calculus (urgent!) March 30th 2008, 11:19 PM #1 Maximum profit - Calculus (urgent!) If profit is given by: p(x) = 280x - 3x^3 + 5x ln(x) The average profit form would be: = p(x) / x = 280 - 3x^2 + 5 ln(x) ___________________ now, how do i determine how many units shoul...
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