The Math Sorcerer

Thursday, December 17, 2015

The Quaternion Group

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Definition of the Symmetric Group

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Proof that f(x) = 1/x is Continuous on (0, infinity) using Delta-Epsilon

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Prove the function f:Z x Z → Z given by f(m,n) = m + n - 3 is Onto(Surje...

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Prove the function f:Z^+ → Z given by f(n) = (-1)^n * n is Injective(one...

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Prove that f(x) = sqrt(|x|^3) is Differentiable at x = 0

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Prove that W = {(x_1,...,x_n)| sum(x_i) = 0} is a Subspace of the Vecto...

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Prove the function f:Z x Z → Z given by f(m,n) = 2m - n is Onto(Surjective)

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Prove the Set of all Odd Functions is a Subspace of a Vector Space

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Proof that f(x) = x*|x| is Differentiable at x = 0

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Determine if W = {(a,b,c)| a = b^2} is a Subspace of the Vector Space R^3

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Introduction to Cycle Notation in the Symmetric Group

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Cycle Multiplication Example in the Symmetric Group S_4

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Determine if W is a Subspace of a Vector Space V Polynomial Example

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Cycle Multiplication Example in the Symmetric Group S_7

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Determine if W= {(a, b, c)| a ≤ b ≤ c} is a Subspace of the Vector Space...

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Multiplying Permutations in Array(Two-Line) Notation in the Symmetric Gr...

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Multiplication of Cycles in the Symmetric Group S_6

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Graph the Hyperbola (y + 2)^2/4 - (x - 1)^2/9 = 1

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Prove the Set of all Bounded Functions is a Subspace of a Vector Space

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Determine if W = {(a, b, c)| b nonnegative} is a Subspace of the Vector ...

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Converting Cycle Notation to Array(two-line) Notation in the Symmetric G...

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Determine if the Unit Sphere is a Subspace of the Vector Space R^3

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Writing a Permutation in the Symmetric Group S_5 in Cycle Notation

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Wednesday, December 16, 2015

Proving two Spans of Vectors are Equal Linear Algebra Proof

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Multivariate Limit of (x^4 + y^4)/(x^2 + y^2) using Polar Coordinates

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Limit of sqrt(x^2 + y^2)ln(sqrt(x^2 + y^2)) using Polar Coordinates and ...

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Multivariable Calculus Limit of y^2/(x^2 + y^2) as (x,y) approaches (0,0)

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Parametric and Symmetric Equations of a Line Parallel to v = (-2,-4,6) P...

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Solve the Nonlinear System x^2 + y^2 = 4, 2x^2 - 3y^2 = -12

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Equation of the Conic given the Length of the Major Axis, Eccentricity, ...

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Convert the Cylindrical Coordinate (2, pi/4, 8) into Rectangular Coordin...

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Equation of Conic with Center (0,0) Focus (4,0) and Eccentricity = 7/5

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Multivariable Calculus Limit of x^2y/(x^2 + y^2) using Polar Coordinates

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Solve the Nonlinear System of Equations 2x^2 - y^2 = 16, |x| = |y|

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Find the Equation of the Conic given the Eccentricity, Vertex, and Center

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Convert the Cylindrical Coordinates (4, pi/6, 3) to Rectangular Coordinates

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Multivariable Calculus Limit of (x - y - 1)/(sqrt(x - y) - 1) by Rationa...

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Determine if the Relation is a Function Example with Diagram

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Equation of Conic with Vertex (0, 2) Center (0, 0) and Eccentricity = 4/3

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Converting the Parametric Equations x = e^t and y = e^(-2t) to Rectangul...

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Tuesday, December 15, 2015

How to Convert Cylindrical Coordinates to Rectangular Coordinates

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Equation of Conic with Eccentricity = 1/2 Center (0,0) and Focus (2,0)

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Solve the Nonlinear System of Equations x^2 + y^2 = 4, 7x^2 + 7y^2 = 2

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Finding the Coterminal Angle of Least Positive Measure

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Limit of sin(x^2 + y^2)/(x^2 + y^2) using Polar Coordinates and L'Hopita...

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Multivariable Calculus The Limit of x/(x + y) as (x, y) approaches (0, 0)

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Parametric and Symmetric Equations given a Point and a Parallel Vector

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Equation of Conic with Eccentricity = 2/3 Focus (0,-1) and Center (0,0)

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Solve 2sin^2(x) + 3sin(x) + 1 = 0

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Find the Complement and Supplement of 45 Degrees

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Solve sin(x)*cot(x) - sin(x) = 0

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Find the Complement and Supplement of 70 Degrees

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Monday, December 14, 2015

Convert pi/3 to Degrees

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Write the Parametric Equations x = t - 1, y = (1/3)t^2 + 1 in Rectangula...

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Write the Parametric Equations x = t - 1, y = (1/3)t^2 + 1 in Rectangula...

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Find the Arc Length with r = 17cm and theta = 2pi/7

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Convert 7pi/4 to Degrees

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Find the Complement and Supplement of 40 Degrees

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Maclaurin Series for f(x) = e^(-x)

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Write the Parametric Equations x = ln(t), y = 3ln(t) in Rectangular Form

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Given Supplementary Angles Find the Angles

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Converting Radians to Degrees Example with pi/6

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Find the Area of the Sector with r = 17.2m and theta = pi/3

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Find the Area of the Sector with r = 17.2m and theta = pi/3

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Complement of Supplement of an Angle in Radians pi/7

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Equation of Conic with Eccentricity = 1 Focus (-3,0) and Vertex (0,0)

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Converting Degrees to Radians Example with 50 Degrees

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Write the Parametric Equations x = sqrt(t), y = t^4 - 1 in Rectangular Form

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Given Complementary Angles Find the Angles

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Angle of Least Positive Measure Coterminal with -pi/6

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Find the Complement and Supplement of an Angle in Radians pi/6

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Find the Equation of the Conic with Eccentricity = 1 Focus (0, 6) and Ve...

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Thursday, December 10, 2015

Proof that sum(sin(n)/n) Converges using Dirichlet's Test

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Proving a Function is a Linear Transformation F(x,y) = (2x + y, x - y)

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If Lambda is an Eigenvalue of A then Lambda^2 is an Eigenvalue of A^2 Proof

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System of Linear Equations with Invertible Coefficient Matrix has a Uniq...

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Finding all Real Eigenvalues of a 3 x 3 Matrix

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Determine if T is a Topology on X

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Proof that f(x) = x^2 is Uniformly Continuous on (0, 1)

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Two Topologies on X whose Union is not a Topology on X

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The Intersection of Topologies on X is a Topology on X Proof

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Monday, December 7, 2015

The Discrete Metric is a Metric Proof

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Sunday, December 6, 2015

Find the Quotient Group (Z_3 x Z_2)/({0} x Z_2) Example with Direct Product

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Finding the Subspace Topology Easy Example

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The Subspace Topology is a Topology Proof

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Removable and Nonremovable Discontinuities of f(x) = (x + 1)/(x^2 + 3x+ 2)

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Computing a Limit by Rationalizing (sqrt(x + 3) - sqrt(3))/x as x approa...

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Indefinite Integral of 3x*csc^2(7x^2) with u-substitution

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Wednesday, December 2, 2015

Prove W = {(a, b) | a = -b} is a Subspace of R^2

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Tuesday, December 1, 2015

Finding the Quotient Group Example with Integers

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Two Subspaces of R^2 whose Union is not a Subspace

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Determine if W is a Subspace of a Vector Space V

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