GELE Mathematics — Differential CalculusConcept Map

Concept

Limits and Continuity

Sub Concepts

• Limit definition
• Indeterminate forms (0/0, ∞/∞)
• L'Hôpital's rule
• Continuity conditions

Relationship To Central

Foundation for defining derivatives; establishes behaviour near a point

Concept

Derivative Rules and Techniques

Sub Concepts

• Power rule
• Product rule
• Quotient rule
• Chain rule
• Trigonometric derivatives
• Exponential and logarithmic derivatives
• Implicit differentiation

Relationship To Central

Core computational tools for finding rates of change

Concept

Applications to Extrema

Sub Concepts

• Critical points (f' = 0)
• First derivative test
• Second derivative test
• Boundary point evaluation
• Absolute vs local extrema

Relationship To Central

Uses derivatives to locate and classify maxima and minima

Concept

Optimization Problems

Sub Concepts

• Constraint equations
• Single-variable reduction
• Verification of solutions
• Real-world problem setup

Relationship To Central

Practical application of extrema theory to engineering design

Concept

Related Rates

Sub Concepts

• Time differentiation (d/dt)
• Implicit differentiation in time
• Geometric relationship equations
• Substitution timing strategy

Relationship To Central

Connects multiple changing quantities through differentiation with respect to time

Concept

Curve Analysis

Sub Concepts

• Tangent line slope
• Monotonicity and increasing/decreasing intervals
• Concavity and inflection points
• Radius of curvature
• Asymptotes

Relationship To Central

Characterizes function behaviour using derivative information

Concept

Multivariable Derivatives

Sub Concepts

• Partial derivatives
• Mixed partial derivatives
• Directional derivatives
• Gradient vectors
• Optimization in multiple variables

Relationship To Central

Extends single-variable calculus to functions of multiple variables

Concept

Engineering Applications

Sub Concepts

• Deflection rates in beams
• Stress-strain relationships
• Fluid flow optimization
• Heat transfer analysis
• Economic optimization (materials cost)

Relationship To Central

Real-world problems requiring differential calculus in structural and civil engineering

To

Derivative Rules and Techniques

From

Limits and Continuity

Strength

strong

Relationship

Limits define the derivative formally; continuity ensures differentiability

To

Applications to Extrema

From

Derivative Rules and Techniques

Strength

strong

Relationship

Derivatives (especially f' = 0) locate critical points; second derivative classifies them

To

Optimization Problems

From

Applications to Extrema

Strength

strong

Relationship

Extrema theory directly solves optimization: maximize/minimize subject to constraints

To

Related Rates

From

Derivative Rules and Techniques

Strength

strong

Relationship

Related rates use implicit differentiation (chain rule applied to time parameter)

To

Curve Analysis

From

Derivative Rules and Techniques

Strength

strong

Relationship

First derivative shows monotonicity; second derivative shows concavity and curvature

To

Tangent line and Curvature

From

Curve Analysis

Strength

strong

Relationship

Tangent line slope equals first derivative; radius of curvature uses both derivatives

To

Multivariable Derivatives

From

Applications to Extrema

Strength

moderate

Relationship

Partial derivatives extend extrema-finding to functions of several variables

To

Engineering Applications

From

Optimization Problems

Strength

strong

Relationship

Beam deflection, stress minimization, cost reduction are direct optimization applications

To

Engineering Applications

From

Related Rates

Strength

moderate

Relationship

Deflection rates, stress-strain rates, fluid flow rates use related-rate methods

To

Engineering Applications

From

Curve Analysis

Strength

moderate

Relationship

Understanding function behaviour (monotonicity, concavity) essential for design constraints

To

L'Hôpital's rule

From

Limits and Continuity

Strength

moderate

Relationship

L'Hôpital's rule resolves indeterminate limit forms using derivatives

To

Optimization Problems

From

Multivariable Derivatives

Strength

moderate

Relationship

Gradient and partial derivatives enable multi-variable optimization without single-variable reduction