What is Mistake: Definition and 296 Discussions

In contract law, a mistake is an erroneous belief, at contracting, that certain facts are true. It can be argued as a defense, and if raised successfully can lead to the agreement in question being found void ab initio or voidable, or alternatively an equitable remedy may be provided by the courts. Common law has identified three different types of mistake in contract: the 'unilateral mistake', the 'mutual mistake' and the 'common mistake'. The distinction between the 'common mistake' and the 'mutual mistake' is important.
Another breakdown in contract law divides mistakes into four traditional categories: unilateral mistake, mutual mistake, mistranscription, and misunderstanding.The law of mistake in any given contract is governed by the law governing the contract. The law from country to country can differ significantly. For instance, contracts entered into under a relevant mistake have not been voidable in English law since Great Peace Shipping v Tsavliris (International) Ltd (2002).

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  1. P

    What is the difference between superposition and intersection?

    The spherical geometry thought that in the surface does not have the parallel line, actually this idea is wrong, should say: In the spherical surface does not have the straight line parallel line, but in the spherical surface has the curve parallel line. Is very actually good about the curve...
  2. J

    A mistake from Rudin analysis?

    Let B_n=\cup_{i=1}^n A_i . \overline{B_n} is the smallest closed subset containing B_n. Note that \cup_{i=1}^n \overline{A_i} is a closed subset containing B_n. Thus, \overline{B_n}\supset \cup_{i=1}^n \overline{A_i}Isn't the truth should be that \overline{B_n} is the smallest? How...
  3. Z

    What is the Correct Integral for x * (arcsin x) * (1-x2)-1/2 dx?

    Homework Statement Find the integral of x * (arcsin x) * (1-x2)-1/2 dx Homework Equations integration by parts The Attempt at a Solution u = x, u' = 1 v' = (arcsin x) * (1-x2)-1/2 (= f(x) * f'(x) ) so v = ((arcsin x)2) / 2 using integration by parts uv - integral of u'v...
  4. J

    Bernouilli ODE (where is my mistake?)

    found my mistake... thanks
  5. L

    Propability: Somebodys mistake

    Homework Statement bayes theorem we got 5 boxes with white and black balls ,2 boxes have 2 white balls and 3 black, 2 boxes have 1 white and 4 black , 1 box has 4 whites and 1black .From a random extraction the ball turned out to be black find propability that the extracted ball was from the...
  6. N

    Could there be a mistake in the textbook solutions?

    I have Honors in Physics and am a qualified teacher, but I've taken 4 yrs out to have kids. I'm trying to get back into it by starting with tutoring, and I am totally perplexed by this solution to the question, so think there is a fault with it. The book is a new edition so it is possible. I'm...
  7. T

    Installed directx 11 by mistake.

    I clicked download and run for directx11 without really thinking about it and now, daily, I've been trying different websites to get 9.0c installed back again and nothing seems to work. Ive done this about 10 times now...I find a website/mirror etc with 9.0c on it and download the damn thing...
  8. C

    Did My Lecturer Make a Mistake in this Physics Equation?

    Hi guys, I am currently studying a basic college physics course at a university in New Zealand. The course is only going over what we were taught in college so far. I came across a practice problem and was unsure how to go about solving it. So I looked up my lecturers online notes and I...
  9. S

    Frequency, and finding wave speed. Professor mistake?

    I am studying for an upcoming test, and it is known that there are hiccups in our study guide. I am stuck on two problems. Homework Statement 1. What is the frequency, in Hz, of a sound wave (v=340 m/s) with a wavelength of 10 m? 2. A series of ocean waves, each 8 m from crest to...
  10. M

    Can you spot the mistake in this equation?

    Somebody find the mistake here: 1=\sqrt{1}=\sqrt{(-1)(-1)}=\sqrt{(-1)^2}=-1 \Rightarrow 1=-1
  11. 3

    Is 0=1 or is it my mistake? A question on indefinite integration.

    Obviously it is my mistake but i am wondering what is the mistake i made. First of all, i didn't know how to type math in this forum so i attached a word document with my "idea"
  12. Z

    Rotation of coordinate system mistake or paradox?

    Hello to all, I am currently studying computer graphics and I have came up with the following problem. Consider that we have three coordinate systems, let's say CSA1, CSA2 and CSA3 that have the same origin and differ by a rotation. That is to CSA2 connects to CSA1 by R12 and CSA3 to CSA1 by...
  13. D

    MythBusters: Testing Impact Velocity Error

    Mythbusters mistake: They are currently testing that two cars impacting each other at 50mph each is similar to one hitting a solid wall at 100mph. Regardless of this possible result, their small scale is bugging me. The rig consists of a swinging arm, like a pendulum, and they are measuring...
  14. T

    Can anybody find a mistake in this Avatar photo?

    My professor showed us this photo from Avatar and asked if anybody could find a mistake within it, but I can't see it! Can you tell what is wrong with it? http://img291.imageshack.us/img291/6331/pandoraavatar.jpg The mass closest to us is Pandora and there is a small thing off to the right...
  15. H

    Partial Differentiation (very simple mistake, I think)

    Homework Statement [PLAIN]http://img408.imageshack.us/img408/7163/partialdifferent.jpg So this means differentiate w.r.t y first, so I want dz/dy, and then w.r.t x right? so I rearrange so that y=z3/3 + xz and differentiate w.r.t z to get dy/dz, and then do 1 over this which i get as...
  16. Rasalhague

    Printing mistake in A First Course in General Relativity?

    Is is a typo? The 1985 edition of Schutz: A First Course in General Relativity, p. 52, equation 2.37, which is supposed to express the idea that "photons have spatial momentum equal to their energy": \vec{p} \cdot \vec{p} = -E^2 + E^2 = 0. Shouldn't this be \vec{p} \cdot \vec{p} = E^2...
  17. C

    Wiki Helium Article mistake?

    The Wikipedia article on the Helium Atom goes through the Thomas-Fermi approximation and shows that when you use a screening parameter Z you can optimize the energy of the atom according to the following formula: \langle H \rangle = [-2Z^2 + \frac{27}{4}Z]E_1 (E_1 is elsewhere defined as the...
  18. N

    Electrical force look for my mistake please

    A small 5.48 g plastic ball is suspended by a 24.7 cm long string in a uniform electric field of 3980 N/C, as shown.The acceleration of gravity is 9.8 m/s2 , and the Coulomb constant is 8.99×109 N · m2/C2.. If the ball is in equilibrium when the string makes a 27.6◦ angle with the vertical...
  19. P

    Textbook Mistake: Ionization Energy of He+

    This is a question from a chem textbook but it seems relevant to electrodynamics/quantum mechanics. The energy to ionize a hydrogen atom in its ground state is given by: En = -Rhc / n2 Ei = Rhc (because the electron is being taken to infinity) = 1312kJ/mol The book claims that to ionize...
  20. G

    2008 AP Physics B Free Response MISTAKE?

    2008 AP Physics B Free Response MISTAKE? Homework Statement Question number two can be found here... http://apcentral.collegeboard.com/apc/public/repository/ap08_physics_b_frq.pdf Homework Equations The Attempt at a Solution Ok I was working out question number two and was...
  21. D

    Mistake in Ballentine's book?

    Hi folks, I'm just reading Ballentine's book on quantum mechanics and was wondering whether he really made a mistake. It's about the variational principle. In chapter 10.6 (p. 296 in the current edition) he says: Shouldn't read <\psi|\mathcal{H}|\psi> {\color{red}\geq} E_m \sum_n...
  22. O

    Is this a mistake in Steven Weiberg's QFT II textbook?

    I guess it should be my mistake somewhere. o:) https://www.amazon.com/dp/0521670543/?tag=pfamazon01-20 On Page 30, for the derivation of EQ. (15.7.19), the nilpotency of BRST operator on the ghost for gauge transformation, \delta _{\theta}s\omega_\alpha &=& -...
  23. S

    Calculating semester gpa? did my school make a mistake?

    ok i know ill come off as a smart *** here..but I am a premed major, and I am dealing with very stiff competition. every single point on my gpa means a lot to me. with that being said this semester i didnt do so hot. i got an A- in a 4 credit biology course, a B in a 4 credit math course, and an...
  24. W

    There is a mistake in relativity.

    I found a verry simple mistake in the Michelson Morley interferometer experiment. If I understand it right, both of interference patterns were the same, right? We have to take into account for two frames of refference though. One for a person observing from Earth, and one for a person observing...
  25. mnb96

    Determinant of (A+B) in GA: where is the mistake?

    Hello, I am quite new to Geometric Algebra, this is the reason for the silly question. In Geometric Algebra, the following implicit definition of determinant is given: f(\mathbf{I_n})=det(f)\mathbf{I_n} where f is a linear function extended as an outermorphism, and \mathbf{I_n} is the unit...
  26. J

    Cal 2 ratio test where is my mistake

    cal 2 ratio test "where is my mistake" Homework Statement I attached a pic I solved the problem but i get 4^1 and the book says 4^2 I don't know why? Homework Equations http://img690.imageshack.us/img690/1518/problem15.jpg The Attempt at a Solution
  27. J

    Small mistake, complex calculus

    Im trying to solve: But i always come out: \int^{2PI}_{0} (sin²(x) / (5 - 4cos(x))dx ==> (i/4)\oint(z^2-1)^2 / (z^2(z-2)(z-1/2)) dz= 2pi i (i/4) (RES (z=0) + RES (z = 1/2)) = (-pi/2) (5/2 - 3/2) = -pi/2 instead of pi/4 please help
  28. I

    Physics Problem, cant find mistake, okz help

    Here is the Problem: For a movie scene, an 85.0 kg stunt double falls 12.0 m from a building onto a large inflated landing pad. After touching the landing pad surface, it takes her 0.477 s to come to a stop. What is the magnitude of the average net force on her as the landing pad stops her...
  29. F

    Silly u-substitution mistake happening somewhere

    Homework Statement \int\frac{sin(2x)}{1+cos(x)^2} Homework Equations None? The Attempt at a Solution I know I can use a trig identity to end up with a numerator of -- 2sin(x)cos(x) So: \int\frac{2sin(x)cos(x)}{1+cos(x)^2} I am using u=1+cos(x)^2 and...
  30. K

    Mathematica Mathematica Mistake? Solve Puzzling Integration Issue

    There is something pretty strange going on with mathematica right now. When I do the following function Integrate[(n x + 1)^2,x] I get the result \frac{(1+nx)^3}{3n} Expanded this is \frac{1}{3 n}+x+n x^2+\frac{n^2 x^3}{3} However this is not the result I get if I integrate the...
  31. cepheid

    What happened to my .txt files after accidentally using 'mv *' in UNIX?

    Hi, I was trying to type: mv *.txt some_other_directory but I accidentally hit 'return' after just typing: mv * Many of the .txt files in my current directory disappeared (but not all of them, strangely enough). Does anyone know what might have happened to them and how to undo the...
  32. F

    Is the matrix logarithm function defined correctly?

    Homework Statement Let I be the identity matrix, and let N be a nilpotent matrix order k. Then the matrix exponential function is defined as: exp(N) := I + N + (1/2!)*N^2 + (1/3!)*N^3 + ... + (1/k!)*N^k Similarly, we may define the matrix logarithm as the function -log(N) := I - N +...
  33. J

    What is the mistake in my reasoning for Cauchy sequences?

    As far as I understand, a sequence converges if and only if it is Cauchy. So say for some sequence a_n and for all epsilon greater than zero we have |a_n - a_{n+1}| < \epsilon for large enough n. We could then say a_n converges if and only if \lim_{n \rightarrow \infty} a_n - a_{n+1} = 0 ...
  34. D

    Please help me find my mistake in this integration

    \intdx/x*(x2-1)0.5 (from 1 to infinity) i said t=(x2-1)0.5, therefore x2=t2+1 dt=x/(x2-1)0.5 so now i have \intdx/x*(x2-1)0.5=\intxdx/x2*(x2-1)0.5=\intdt/x2=\intdt/t+1 (now integral from 0 to infinity) \intdt/t+1 (from 0 to infinity) =lim arctan(t)^{b}_{0}=pi/4 b-inf but...
  35. Q

    Did I make a mistake in choosing physics over math?

    Hi everyone, I've been accepted to a graduate school that is good in gravitation, which is what I want to do. Here is the thing: lately I've been wondering if I should've become a mathematician instead of a physicist. I was a dual math/physics major for my undergrad. work, and loved the math...
  36. W

    Output of a transformer plugged into a DC voltage source by mistake?

    Homework Statement What would be the output of a transformer plugged into a DC voltage source by mistake? Homework Equations N/A The Attempt at a Solution Judging from the phrasing of the question, I am assuming that a transformer should not be plugged into a DC voltage source...
  37. J

    Interaction picture (Is there a mistake in QFT books?)

    It is often stated that the transition amplitude between eigenstates of the free-field Hamiltonian H_0 is encoded by the S-matrix, defined by \langle \mathrm{f} | U{_\mathrm{I}} (\infty,-\infty)|\mathrm{i} \rangle. where U_{\mathrm{I}} is the time-evolution operator in the interaction...
  38. F

    Understanding Vector Subspaces and Direct Sums

    probably not but if not i don't know where to start... let U and W be vector subspaces of V. Show that UnW is a vector subspace of V define the subspace U+W. What does it mean to say that V is a direct sum, UdirectsumW of U and W understand the direct sum part but surely i need values of U...
  39. B

    Syringe: probably a really simple mistake that I can't seem to catch

    Homework Statement A syringe of volume 20 ml has just been used and now lies empty on the doctor's desk. The pressure in the office is 100,000 Pa. Assume that the air is an ideal gas consisting of nitrogen N2 (80%) and oxygen O2 (20%) molecules. k=1.38×10-23 J/K and the molar mass of oxygen...
  40. S

    Simple problem - cant spot my own mistake

    Solved, thanks Tedjin.
  41. D

    I finding my mistake moment of inertia

    How do i prove,using integration, that the moment of inertia of a hollow cylinder that has mass M, an outside radius R2, and an inside radius R1 is given by... I=.5(M)(R2^2+R1^2) here is the work I have done... I am really close but do not see where I made my mistake Can someone help me...
  42. A

    Terrible Mistake: What Can One Do?

    What do you do when you come to know that you have comitted a terrible mistake, & everything you hoped you ll get when you made the decision, was never there:mad:. Now you can't turn back, what can one do? Keep fighting to change the things to be the way they should be? or give up, & adopt to...
  43. S

    Calculate the rope tensions (please tell me if I've made a mistake)

    Homework Statement Two students want to raise a heavy box onto the back of a truck. They do this by putting a rope through a handle on the box, and each lifting one side of the rope. The arrangement is symmetrical, so that the rope makes an angle (theta) with the horizontal on either side. The...
  44. T

    Where is my mistake following this code

    next to every line i commented on what i think it does where is my mistake in understanding of changing the index of the pointer ?? #include <stdio.h> int main() { int *ptr; int arrayInts[10] = {1,2,3,4,5,6,7,8,9,10}; ptr = arrayInts...
  45. T

    Where is my mistake in undersanding the order of this code

    when i compile it i get perfectly well output without any endless recursion but when i trace this code: #include <stdio.h> int a(int n,int count){ int i; for(i=0;i<n;i++) count =a(i,count); <<<<<<<<<<the problematic line return count+1; }...
  46. B

    Need help to find my mistake in a simple proof of a matrix algebra proposition.

    Homework Statement Is the following true for matrices? Hypotesis: AB = AC A != 0(zero matrix) Thesis: B=C The Attempt at a Solution AB = AC AB - AC = 0(zero matrix) AB - AC = A(B-C) // using the following property: A(B+C) = AB + AC iff A is mn matrix and BC are np matrices...
  47. F

    Is there a mistake here so far?

    question attached
  48. K

    Georgia Tech vs Rutgers: Aerospace Engineering Degree

    I am currently attending georgia tech for aerospace engineering for bachelors but I am from NJ, I've been thinking about whether I shouldve gone to rutgers because they offered me a very generous scholarship in which I wouldve only had to have paid 1/4 of estimated expenses, should I have gone...
  49. P

    Discrete systems possible mistake in answers

    starting with the iterated map derived in the notes for calculating rootp(p>0) Xn+1=1/2(Xn+(p)/(Xn) calculate root 7 starting with x0=1 so ok starting with that i get x0=1 x1=4 and then something strange happens the sub in looks like this X2=1/2(4+2/4)=9/4 i was under the...
  50. S

    Mistake regarding lamps on wikipedia

    http://en.wikipedia.org/wiki/Lamp_%28electrical_component%29 The wikipedia article on lamps says the following: "A lamp is a replaceable component such as an incandescent light bulb, which is designed to produce light from electricity." Some lamps are powered from gas, not electricity.
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