Mathematics Branches, Topics, and Sub-Topics

A structured visual guide to the major mathematical areas and their relationships.

Search by code, branch, topic, subtopic, or a keyword from the descriptions.

70Exx Dynamics of particle systems

This subtopic introduces the core ideas in dynamics of particle systems, including foundational concepts, standard methods, and the main questions used to organize the area. Typical uses include building mathematical background, framing related research problems, and supporting applications in neighboring fields where these concepts provide useful structure.

Specific topics

70E05 Motion of the gyroscope

Overview

This topic studies the dynamics of spinning rigid bodies, especially gyroscopes, including precession, nutation, and the coupling of spin with external torques. It is a classical example of nontrivial rigid-body motion.

Related Wikipedia Page

Gyroscope (Wikipedia)

Useful Links

Key Ideas

  • Spin, precession, and torque balance
  • Stability of rotational states
  • Coupling between orientation and angular momentum

Typical Uses

Used in navigation, aerospace, and control systems where rotational stability is central.

Applications

  • Navigation systems
  • Inertial guidance
  • Gyroscopic stabilization

References

Recommended Textbooks

70E15 Free rotation of a rigid body

Overview

This topic studies the torque-free motion of a rigid body, including Euler equations, Poinsot motion, and the role of principal moments of inertia. It is one of the canonical examples of integrable rigid-body dynamics.

Related Wikipedia Page

Euler angles (Wikipedia)

Useful Links

Key Ideas

  • Euler equations for torque-free rotation
  • Invariant polhodes and angular momentum geometry
  • Stability of principal-axis rotation

Typical Uses

Used in satellite attitude dynamics, molecular modeling, and the study of symmetric top motion.

Applications

  • Spacecraft attitude
  • Rigid-body stability
  • Classical mechanics demonstrations

References

Recommended Textbooks

70E20 Perturbation methods for rigid body dynamics

Overview

This topic studies perturbation expansions and asymptotic methods for nearly integrable rigid-body problems, including small-parameter expansions and secular behavior. It is a bridge between exact classical models and realistic systems with weak disturbances.

Related Wikipedia Page

Perturbation theory (Wikipedia)

Useful Links

Key Ideas

  • Regular and singular perturbation expansions
  • Secular terms and resonance phenomena
  • Approximation of nearly integrable motions

Typical Uses

Used when exact solutions are unavailable and one needs controlled approximations for weakly perturbed rigid-body motions.

Applications

  • Spacecraft motion
  • Orbital mechanics
  • Mechanics of flexible systems

References

Recommended Textbooks

70E40 Integrable cases of motion

Overview

This topic studies special integrable cases of rigid-body and mechanical motion, where conserved quantities allow closed-form solutions or explicit reduction to simpler systems. Such cases illuminate the structure of more general dynamics.

Related Wikipedia Page

Integrable system (Wikipedia)

Useful Links

Key Ideas

  • Integrals of motion and reduction
  • Special symmetric cases such as Euler and Lagrange tops
  • Explicit solvability and invariant manifolds

Typical Uses

Used to understand solvable models, benchmark numerical methods, and reveal the geometry behind more complicated trajectories.

Applications

  • Hamiltonian systems
  • Mechanical benchmarks
  • Astrodynamics

References

Recommended Textbooks

70E55 Dynamics in the study of multibody systems

Overview

This topic investigates the dynamics of systems composed of multiple interconnected rigid bodies, including constraints, joints, and internal forces. It is central to biomechanics, robotics, and mechanical simulation.

Related Wikipedia Page

Multibody system (Wikipedia)

Useful Links

Key Ideas

  • Joint constraints and generalized coordinates
  • Constraint forces and energy methods
  • Formulation of large-scale mechanical systems

Typical Uses

Used to model robotic arms, biomechanics, automotive systems, and other assemblies of linked bodies.

Applications

  • Biomechanics
  • Robotics
  • Mechanical simulation

References

Recommended Textbooks