Every AI999X model,
in one place.
Offline scientific models, one per field. Filter by field and task, search by topic, and open any model for its worked examples, code, figures and every capability.
Mathematics & Statistics 10
Bayesian Statistics
bayesian-statistics-ai999x
Bayes' theorem, conjugate priors and posteriors, credible intervals, Bayes factors, Monte Carlo estimation, uncertainty propagation, sensitivity…
Calculus
calculus-ai999x
Limits, derivatives, integrals, series, Taylor polynomials, multivariable and vector calculus, special functions and numerical differentiation and…
Differential Equations
differential-equations-ai999x
First- and second-order ODEs, linear systems, Laplace transforms, stability and phase portraits, numerical methods, classic PDEs (heat, wave…
Discrete Math
discrete-math-ai999x
Number theory, modular arithmetic, combinatorics, graph theory and network algorithms, logic and the mathematics of cryptography
Geometry
geometry-ai999x
Plane and solid geometry, coordinate geometry, conic sections, polygons and polyhedra, computational geometry (convex hulls, Voronoi, triangulation)…
Linear Algebra
linear-algebra-ai999x
Vectors, matrices, determinants, linear systems, eigenvalues, decompositions, least squares, sparse matrices and numerical methods (root finding…
Math Foundations
math-foundations-ai999x
Arithmetic, fractions, percentages, ratios, algebraic equations and inequalities, functions, exponentials and logarithms, trigonometry, precalculus…
Optimization
optimization-ai999x
Linear and integer programming, convex and nonlinear optimisation, assignment, transportation and shortest-route problems, scheduling, inventory…
Statistics
statistics-ai999x
Descriptive statistics, probability distributions, confidence intervals, hypothesis tests, regression and correlation, experimental design, quality…
Time Series
time-series-ai999x
Moving averages, exponential smoothing, autocorrelation, ARIMA basics, stationarity tests, change points, forecasting accuracy and Kalman filtering
Physical Sciences 6
Astronomy
astronomy-ai999x
Celestial mechanics and orbits, stellar properties, blackbody radiation, magnitudes and distances, cosmology basics, the Sun and space environment…
Chemistry
chemistry-ai999x
Stoichiometry, gas laws, solutions, chemical equilibrium, acids and bases, kinetics, thermochemistry, electrochemistry, molecular properties and…
Classical Physics
classical-physics-ai999x
Kinematics, dynamics, energy, momentum, rotation, gravitation, oscillations, waves and sound, optics, thermodynamics, electricity and magnetism
Earth Science
earth-science-ai999x
Atmospheric thermodynamics and meteorology, climate and radiation balance, oceanography and seawater properties, seismology and geophysics, and…
Materials Science
materials-science-ai999x
Crystal structures and diffraction, defects and diffusion, mechanical properties, phase diagrams, polymers, ceramics and composites, and electronic…
Quantum Physics
quantum-physics-ai999x
Special relativity, photons and matter waves, the hydrogen atom, quantum wells and tunnelling, spin and qubits, quantum gates, nuclear and particle…
Engineering 15
Aerospace Engineering
aerospace-engineering-ai999x
The standard atmosphere, lift and drag, aircraft performance, stability, propulsion and rocket performance, nozzles and orbital transfers
Chemical Engineering
chemical-engineering-ai999x
Material and energy balances, reactor design, separations (distillation, absorption, extraction), transport phenomena, process control and reservoir…
Civil Engineering
civil-engineering-ai999x
Pipe and open-channel hydraulics, hydrology, groundwater flow, soil mechanics and foundations, water networks and surveying
Control Systems
control-systems-ai999x
Transfer functions, poles and zeros, step and frequency response, stability (Routh-Hurwitz, gain and phase margins, Nyquist), root locus, state…
Electrical Engineering
electrical-engineering-ai999x
DC and AC circuits, transients, phasors and power, operational amplifiers, diodes and transistors, digital logic, and control systems (transfer…
Electronics Engineering
electronics-engineering-ai999x
Semiconductors and pn junctions, diode circuits and rectifiers, BJT and MOSFET biasing and amplifiers, op-amp circuits, active filters, oscillators…
Energy Systems
energy-systems-ai999x
Power systems and load flow, three-phase power, transformers and machines, solar photovoltaics, wind power, batteries, fuel cells and hydrogen
Environmental Engineering
environmental-engineering-ai999x
Gaussian plume dispersion and plume rise, BOD and Streeter-Phelps oxygen sag, water and wastewater treatment design, activated sludge, disinfection…
Industrial Engineering and Supply Chain
industrial-engineering-ai999x
Inventory policies (EOQ, reorder point, safety stock, newsvendor), statistical process control, reliability, queueing, scheduling, forecasting…
Mechanical Engineering
mechanical-engineering-ai999x
Statics, stress and strain, beams and frames, section properties, torsion, columns, fatigue, machine elements, vibrations and structural analysis
Nuclear Engineering
nuclear-engineering-ai999x
Radioactive decay and decay chains, binding energy, reactor physics basics, radiation shielding and attenuation, and dosimetry
Power Electronics
power-electronics-ai999x
DC-DC converters in continuous and discontinuous conduction (buck, boost, buck-boost, Cuk, SEPIC, flyback, forward, bridge), rectifiers and phase…
Signal Processing
signal-processing-ai999x
Sampling, Fourier series and transforms, the DFT and FFT, filters, convolution, z-transforms, modulation, communication links, RF transmission lines…
Thermofluids
thermofluids-ai999x
Fluid statics and dynamics, pipe flow, boundary layers, aerodynamics, heat conduction, convection and radiation, heat exchangers, thermodynamic…
Transportation
transportation-ai999x
Vehicle dynamics, braking and stopping distances, traffic flow, highway geometry, railway operations, route planning and transit capacity
Life Sciences 4
Biomedical Science
biomedical-science-ai999x
Pharmacokinetics and dosing models, epidemic models, diagnostic test statistics, survival analysis, biomechanics, neuron models and medical-imaging…
Cell and Molecular Biology
cell-molecular-biology-ai999x
Membranes and diffusion, osmosis and membrane potentials, cell growth and the cell cycle, DNA and RNA melting temperatures and quantification…
Computational Biology
computational-biology-ai999x
DNA and protein sequences, alignment, molecular weights, genetics and population genetics, phylogenetics, enzyme kinetics, metabolic and population…
Human Physiology
human-physiology-ai999x
Cardiac output, blood pressure, vascular resistance and Poiseuille flow, lung volumes, ventilation and the alveolar gas equation, oxygen content and…
Economics & Finance 2
Actuarial Science and Insurance
actuarial-science-ai999x
Life tables and survival models, life insurances and annuities, net and gross premiums, reserves and Thiele's equation, interest theory, loss models…
Economics and Finance
economics-finance-ai999x
Time value of money, loans and annuities, bonds, stocks and options, portfolio theory, risk measures, actuarial mathematics, microeconomics…
No model matches these filters.
Built to run anywhere.
Every model runs on your own device, under the licence named in each repository: in the desktop app and from the command line on Windows and Linux, in the calculator on its page, or as a typed, documented Python package from PyPI. Its card on Hugging Face documents what it does, its examples and its limits.