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The letter J marks the start of many important mathematical terms that students encounter in various concepts and problem-solving. This article compiles key math vocabulary starting with J across branches like algebra, geometry, statistics, calculus, and more. Learn their meanings with examples to build your math dictionary.

## Algebra

1. Joint Variation – When two variable quantities increase or decrease together in proportion to each other, they exhibit joint variation. For example, your cab fare varies jointly with the distance traveled.
2. Juxtaposition – In algebra, juxtaposition refers to writing terms next to each other without any multiplication symbol. For instance, ab means an x b.

## Geometry

1. Jag – A jag refers to a sharp projection or tooth-like on the edge of a leaf or rock. In geometry, it describes shapes with jutting points and irregular edges.
2. Joukowsky Transform – This complex transform maps the exterior of a circle in the mathematical complex z-plane onto the interior of another circle. It is used in aerodynamics and hydraulic design.
3. Jubate – Having a tuft or crest. In geometry, a jubate triangle is an isosceles triangle having two smaller similar isosceles triangles attached to its base.

## Calculus

1. Jacobian – The Jacobian matrix comprises all the first-order partial derivatives of a vector-valued function. It describes how a function’s outputs vary with inputs.
2. Jet – In differential geometry, the jet space models how a function changes from point to point using its derivatives. For example, a curve’s jet encodes infinitesimal data.
3. Jordan Curve – A Jordan curve is a non-self-intersecting continuous loop in the plane, dividing it into an “interior” and “exterior”. The Jordan Curve Theorem proves some key properties.

## Set Theory

1. Join – The join operation combines two sets A and B to form a new set containing elements of both A and B. For example, the join of {a,b} and {b,c} is {a,b,c}.

Statistics

1. Joint Distribution – The joint distribution of two random variables describes their probabilities together. It generalizes the marginal distribution of each individual variable.
2. Joint Probability – The likelihood of two events happening together. It equals the probability of event A and event B.
3. Jury of Executive Opinion – A technique used in time series analysis and forecasting where a panel of experts votes on quantity forecasts.

## Trigonometry

1. Journey – an old unit of length equalling about 5.5 kilometers. 1 league = 3 journeys.

Logarithms

1. Jolt – A jolt is an old unit used to measure electric potential. It equals 107 abvolts. 1 statvolt = 3.33564Ã—10âˆ’8 jolts.

## Linear Algebra

1. Jordan Canonical Form – Matrix decomposition that transforms any matrix into a simpler diagonal matrix through similarity transformations. It has applications in control theory and differential equations.

## Number Theory

1. Jacobi Symbol – This symbol (a/b) indicates whether integer a is a quadratic residue modulo b, an important concept in number theory.

Here is a list of other math words that start with the letter J:

• Jacobian
• Jacobian Matrix
• Johnson Distribution
• Johnson System
• Johnson-Lindenstrauss lemma
• Jordan Basis
• Jordan Block
• Jordan Canonical Form
• Jordan Curve Theorem
• Julia Set
• Junior Varsity
• Justify
• Jurisprudence
• Juran Statistic
• Jutout
• Juxtapose
• Jacobian Determinant
• Jacobian Inverse
• Jacobi Elliptic Functions
• Jacobi Identity
• Jacobi Symbol
• Jacobsthal Number
• Jarqueâ€“Bera Test
• Jeffreys Prior
• Jordan Decomposition
• Jordan Normal Form
• Jordan Operator
• Joukowsky Transform
• Jump Process
• Jaccard Index
• Jackknife Estimate
• Jackknife Method
• Junior Mathematics League
• Just Noticeable Difference
• J-Statistic
• J-Image
• Jaffe Group
• J-operator
• Join
• Joint Distribution
• Johnsonâ€“Lindenstrauss Lemma
• Jordan Path
• Jacobian Conjugate
• Jensen’s Inequality
• Jensen’s Operator
• Johnson-Lindenstrauss Transform
• Jubilee
• Jukes-Cantor Model
• Junction Tree Algorithm
• Jump Diffusion
• Jones Polynomial
• Junction Tree
• Juxtaposition
• Jumping Number
• Jukesâ€“Cantor Model
• Justify Text
• Jacobi Symbol
• Jordan Triple System
• Jordan Algebra
• Jordan Decomposition Theorem
• Junior Varsity Team
• Jubilee Year
• Justified Layout
• Joukowski Mapping
• Jordan Measure
• Jordan Curve Theorem
• Jordan Normal Form
• Jensen’s Inequality
• Justified Text
• Johnson-Lindenstrauss Lemma
• Junior Scholastic
• Joyce Groups
• Jensen’s Inequality
• Junction Tree
• Jacobian Matrix
• Jost Function
• Joule
• Jaccard Index
• Jahn-Teller Effect
• Jukes-Cantor Model
• Jensen Inequality
• Jacobian Form
• Jones Polynomials
• Junction Tree Algorithm
• Jupiter Math
• Juxtapose
• Joukowski Transform
• Justify
• Jordan Canonical Form
• Judgment Sampling
• Joists
• Joukowski Map
• Julia Sets
• Jordan Decomposition
• Jubilee Year
• Johnson-Lindenstrauss Lemma
• Julia Matrix
• Jaccard Similarity Coefficient
• Jahn-Teller Theorem
• Jordan Form
• Jigsaw Puzzle
• Johnson-Lindenstrauss Transform
• Jordan Cell
• Junior League
• Jump Process
• Jones Polynomial
• Joule’s First Law
• Jost Function
• Jensen’s Measure
• Joukowski Map
• Jukes-Cantor Model
• Joukowski Transformation
• Julia Set
• Join
• Jacobi Elliptic Function
• Jordan Curve
• Joint Probability Function
• Joint Probability Density Function
• Jensen’s Operator Inequality
• Junior Varsity Team
• Jock
• Justify Text
• Jordon Form
• Johnson Measure
• Jordan Structure
• Johnson Distribution
• Joist
• Jordan Content
• Julie’s Law
• Joule’s Equivalent
• Jordan Decomposition
• Junior Math League
• Joukowski Transformation
• Jubilee Year
• Juxtaposition
• Join Operation
• Jacobi Symbol
• Julia Fractal
• Justify Paragraph
• Johnson-Lindenstrauss Lemma
• Johnson Criterion
• Jensen Inequality
• Justified Paragraph
• Jubilee
• Jacobian Matrix Inverse
• Jordan Canonical Forms
• Jump Process
• Joule
• Jaccard Coefficient
• Jahn-Teller Effect
• Jacobian Transformation
• Johnson Distribution
• Jost Differential Equation
• Junction Tree
• Julia Set Function
• Justify Text Alignment
• Joukowski Mapping
• Julia Matrix
• Jost Function
• Join Function
• Jordan Measure
• Jensen’s Identity
• Jacquemin-Arnould Theorem
• Joules Per Kilogram
• Junction Tree Algorithm
• Jacobsthal Numbers
• Junior Mathcounts
• Julia Fractal Set
• Joukowski Transformation
• Jones Polynomials
• Joule’s Law
• Jordan Curve Property
• Johnsonâ€“Lindenstrauss embedding
• J-Statistic Distribution
• Joint Causal Inference
• Justify Text Left
• Join Operation SQL
• Julia Programming Language
• Joyces Groups
• Jacobian Conjugate
• Johnson Criterion Sampling
• Julia Programming
• Jost Differential Operator
• Johnson Distribution Random Variable
• Joint Process
• Justified Block Paragraph
• Johnson Measure Space
• Join Relation
• Johnson Noise
• Jordan Normal Form Decomposition
• Jupiter Math Problem
• Journeyman Exam
• Junior Mathematical League Testing
• Journeyman Electrician
• Jensen’s Integral Transform
• Jordan Elliptic Curves
• Jordan Triple System
• Jordan Algebra Structure
• Justified Text Right

## FAQs

What does joint variation mean in math?

Joint variation refers to two quantities changing in proportion to each other. For example, the total cost varies jointly with the number of items purchased.

How is a jubate triangle different from a normal triangle?

A jubate triangle has two smaller isosceles triangles protruding from the base of a larger isosceles triangle, giving it a jagged shape.

What is the significance of the Jacobian matrix?

The Jacobian matrix helps analyze and represent how a function’s outputs vary corresponding to changes in the inputs. It has applications in optimization, machine learning, and physics.

What does the join operation do in set theory?

The join combines two sets to create a new set containing all elements from both original sets. For {a,b} join {b,c} = {a,b,c}.

What does the Jacobi symbol indicate in number theory?

The Jacobi symbol (a/b) indicates whether integer a is a quadratic residue modulo b, meaning if a has a square root solution modulo b. This helps assess solvability.

### 300 Negative Words Starting with R (With Definitions)

The letter R begins with many words in the English language that express negative...