I wondering how to prove: That scalar products are invariant under all orthogonal transformation:
$<\!x, y\!>\; =\;<\!Qx, Qy\!>$
which holds for all vector $x$,$y \in \Re^n$ and all matrices $Q \in \Re^{n\times n}$ that are orthogonal.
2026-03-27 04:57:07.1774587427
Prove scalar products are invariant under all orthogonal transormation
2.9k Views Asked by Bumbble Comm https://math.techqa.club/user/bumbble-comm/detail At
1
There are 1 best solutions below
Related Questions in MATRICES
- How to prove the following equality with matrix norm?
- I don't understand this $\left(\left[T\right]^B_C\right)^{-1}=\left[T^{-1}\right]^C_B$
- Powers of a simple matrix and Catalan numbers
- Gradient of Cost Function To Find Matrix Factorization
- Particular commutator matrix is strictly lower triangular, or at least annihilates last base vector
- Inverse of a triangular-by-block $3 \times 3$ matrix
- Form square matrix out of a non square matrix to calculate determinant
- Extending a linear action to monomials of higher degree
- Eiegenspectrum on subtracting a diagonal matrix
- For a $G$ a finite subgroup of $\mathbb{GL}_2(\mathbb{R})$ of rank $3$, show that $f^2 = \textrm{Id}$ for all $f \in G$
Related Questions in TRANSFORMATION
- Functions on $\mathbb{R}^n$ commuting with orthogonal transformations
- How do you prove that an image preserving barycentric coordinates w.r.t two triangles is an affine transformation?
- Non-logarithmic bijective function from $\mathbb{R}^+$ into $\mathbb{R}$
- Where does this "magical" transformatiom come from?
- Calculate the convolution: $\frac{\sin(4t)}{\pi t}*( \cos(t)+\cos(6t) )$ using Fourier transform
- Find all $x \in\mathbb R^4$ that are mapped into the zero vector by the transformation $x \mapsto Ax$
- Linear transformation $f (ax+by)=$?
- Is a conformal transformation also a general coordinate transformation?
- Infinite dimensional analysis
- Circle inversion and the Pappus chain paradox
Related Questions in MATRIX-EQUATIONS
- tensor differential equation
- Can it be proved that non-symmetric matrix $A$ will always have real eigen values?.
- Real eigenvalues of a non-symmetric matrix $A$ ?.
- How to differentiate sum of matrix multiplication?
- Do all 2-variable polynomials split into linear factors over the space of $2 \times 2$ complex matrices?
- Big picture discussion for iterative linear solvers?
- Matrix transformations, Eigenvectors and Eigenvalues
- Jordan chevaley decomposition and cyclic vectors
- If $A$ is a $5×4$ matrix and $B$ is a $4×5$ matrix
- Simplify $x^TA(AA^T+I)^{-1}A^Tx$
Related Questions in INVARIANT-THEORY
- Equality of certain modules of coinvariants: $(gl(V)^{\otimes n})_{gl(V)}=(gl(V)^{\otimes n})_{GL(V)}=(gl(V)^{\otimes n})_{SL(V)}$
- Sufficient conditions for testing putative primary and secondary invariants
- Invariant-theory
- If E and F are both invariants of the assignment, any combination E⊕F will also be invariant - how to combine invariants?
- $\operatorname{dim}V^G = \operatorname{dim}(V^\ast)^G$, or $G$ linearly reductive implies $V^G$ dual to $(V^\ast)^G$
- On the right-invariance of the Reynolds Operator
- The polarization of the determinant is invariant?
- Product of two elements in a semidirect product with distinct prime powers
- Largest subgroup in which a given polynomial is invariant.
- Ring of Invariants of $A_3$
Trending Questions
- Induction on the number of equations
- How to convince a math teacher of this simple and obvious fact?
- Find $E[XY|Y+Z=1 ]$
- Refuting the Anti-Cantor Cranks
- What are imaginary numbers?
- Determine the adjoint of $\tilde Q(x)$ for $\tilde Q(x)u:=(Qu)(x)$ where $Q:U→L^2(Ω,ℝ^d$ is a Hilbert-Schmidt operator and $U$ is a Hilbert space
- Why does this innovative method of subtraction from a third grader always work?
- How do we know that the number $1$ is not equal to the number $-1$?
- What are the Implications of having VΩ as a model for a theory?
- Defining a Galois Field based on primitive element versus polynomial?
- Can't find the relationship between two columns of numbers. Please Help
- Is computer science a branch of mathematics?
- Is there a bijection of $\mathbb{R}^n$ with itself such that the forward map is connected but the inverse is not?
- Identification of a quadrilateral as a trapezoid, rectangle, or square
- Generator of inertia group in function field extension
Popular # Hahtags
second-order-logic
numerical-methods
puzzle
logic
probability
number-theory
winding-number
real-analysis
integration
calculus
complex-analysis
sequences-and-series
proof-writing
set-theory
functions
homotopy-theory
elementary-number-theory
ordinary-differential-equations
circles
derivatives
game-theory
definite-integrals
elementary-set-theory
limits
multivariable-calculus
geometry
algebraic-number-theory
proof-verification
partial-derivative
algebra-precalculus
Popular Questions
- What is the integral of 1/x?
- How many squares actually ARE in this picture? Is this a trick question with no right answer?
- Is a matrix multiplied with its transpose something special?
- What is the difference between independent and mutually exclusive events?
- Visually stunning math concepts which are easy to explain
- taylor series of $\ln(1+x)$?
- How to tell if a set of vectors spans a space?
- Calculus question taking derivative to find horizontal tangent line
- How to determine if a function is one-to-one?
- Determine if vectors are linearly independent
- What does it mean to have a determinant equal to zero?
- Is this Batman equation for real?
- How to find perpendicular vector to another vector?
- How to find mean and median from histogram
- How many sides does a circle have?
$<x,y>=x^t y$
$<Qx,Qy>=x^tQ^tQy$
Since $Q$ is orthogonal then $Q^tQ=I$ and hence the scalar product remains invariant