interactive exercises, online calculators and plotters, mathematical recreation and games

Keywords: interactive mathematics, interactive math, server side interactivity

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Activities

Wcalc, multi-purpose single-step calculator usable in popup mode.
OEF calculations, collection of exercices on calculation (fractions, signed numbers).
Bezout, computes euclidean division, gcd, lcm, Bezout relation.
OEF fractions, collection of exercises on fractions.
Coincidence-Polynomial, find a polynomial according to its curve.
Complex shoot, locate a complex number by clicking on the complex plane.
Elliptic billiards, bouncing on a billiard table of elliptic form.
Goldbach, write an even integer as sum of two primes.
Triangular shoot, click on one of the centers of a triangle.
Magic rectangles, game based on a variation of magic squares.
Contfrac, expand a real number into continued fraction.
Calculations with a clock, reading a clock.
OEF powers, collection of exercices on calculation of powers
Line choice, recognize a line, by equation or by graph.
Sigma, computes sums of series or finite sums of various kinds.
OEF rectangles, collection of exercises on rectangles.
Sequence plot, plot a numerical sequence or series.
OEF proportionality, collection of exercises on proportionality.
Additive figures, place numbers in geometric figures according to conditions on sums.
Correspondance, visual exercise on the definition of a map.
OEF derivatives, collection of exercises on derivatives of functions of one variable.
OEF complex, collection of exercises on complex numbers.
Derivative draw, given the graph of a function, draw that of the derivative. Requires java.
OEF Linsys 2x2, collection of exercises on elementary linear systems 2x2.
Practicing with Fractions (part 2), fractions and multiplication,addition,division,reducing.
OEF clock, collection of exercises on clock recognition.
Homothety shoot, click on the center of an homothety 2D.
Vector shoot, click on a linear combination of 2D vectors.
Choice of ellipses, recognize an ellipse according to its equation, or vice versa.
Pathfind, link points by a shortest path.
Animated sequences, animated plot of a sequence (series) of functions.
Quizz complex, elementary questions on complex numbers.
OEF polynomial, collection of exercises on polynomials of one variable (real or complex coefficients).
Graphic addition, recognize the graph of f(x)+g(x) from that of f and g, etc.
Interactive integration, solve an integration step by step.
Cross multiplication, find a matrix not commuting with a given one.
Coincidence sinus, find a sinusoidal function according to its graph.
Tangent 2D, find tangent / normal line of a plane curve.
Coincidence Freehand, find the best possible approximation of a given curve.
OEF definite integral, collection of exercises on definite integrals of one variable (theory and computation).
Circular draw, draw the circumscribed circle of a triangle, etc. Requires java.
Parametric points, plots a parametric curve with moving point.
Graphic subsets, recognize a graphically described subset.
OEF inverse, collection of exercises on the inverse function of a real bijective function.
OEF orthogonal distance, collection of exercises on orthogonal projection and distance.
Graphic integral, recognize the graph of the integral of a function.
Partial equation, fill-in an equation to make it correct, drag-and-drop style exercises.
Inverse draw, draw an inverse function, requires java.
Function draw, draw a function using the graph of another, requires java.
Segfrac, split a fraction into sum of fractions with smaller denominators.
OEF geometric integral, collection of exercises on geometric applications of definite integrals of one variable.
Popup calculator forms, you can search calculating forms or insert them into your own web pages.
Morse Training, code/decode a text in Morse code.
Quizz integration, elementary questions on integration.
OEF several variables functions, collection of exercises on several variables functions.
Two squares, decompose an integer into sums of two squares.
Quizz vector spaces, elementary questions on vector spaces.
Accordance, find a polynomial according to its values.
Epsilon, on the definition of continuity: given epsilon, find delta.
Vision 4D, plots hypersurfaces etc. in space-time of dimension 4.
Order arrangement, arrange given numbers according to their order.
OEF derivative, practising with differentiation
OEF triangles, collection of exercises on triangles.
Linear shoot, click on the image of a point by a linear transformation.
SQRT shoot, locate (square, cubic, ...) roots of a complex number by clicking on the complex plane.
OEF modular arithmetic, collection of exercises on the ring Z/nZ.
MVT calc, a computing exercise on Mean Value Theorem.
OEF determinant, collection of exercises on the determinant of a square matrix.
Basis change, write a vector under another basis.
OEF subspace definition, collection of exercices on the definition of subspace of vector spaces.
Complex equation draw, draw an equation in the complex plane, requires java.
Primitive draw, given the graph of a function, draw that of an anti-derivative. Requires java.
Min-Max, diverse exercises on minima / maxima.
OEF vector subspaces, collection of exercises on vector subspaces.
Tangent parameters, find the curve having a given tangent.
Graphic ODE, graphically recognize solution of a linear ordinary differential equation.
Polynomial sweep, graphs and roots of a polynomial, with animated deformation.
PermGroup, calculator of permutation groups based on GAP: symmetric, alternating, transitive, primitive, etc.
OEF ODE, collection of exercises on elementary ordinary differential equations.
OEF gcd, collection of exercises on gcd and lcm of integers.
OEF linear systems, collection of exercises on linear systems.
Parametric choice, from a parametric curve, recognize values or derivatives of functions. Animated graphics.
Genspace, does a given set of vectors generate the whole vector space?
Parametric compose, recognize a parametric curve by the graphs of its coordinate functions.
Inequality zone, determine an inequality for variables in a given zone.
OEF arccos, collection of exercises on inverse trigonometric functions.
OEF physical integral, collection of exercises on physical applications of definite integrals of one variable.
OEF vectors 3D, collection of exercises on 3D vectors.
Decomp, decompose a composed function.
Graphic inequalities 2D, recognize a plane region described by inequalities.
OEF double integrals, collection of exercises on double integrals.
Joint, parametrize a function to make it differentiable to a required order.
Huffman, find an optimal encoding in variable length codes.
OEF euro, collection of exercises on the arithmetic of euro.
Finite field calculator, computes elements in a finite field.
OEF permutation, collection of exercises on permutation.
Triangmult, find two triangular matrices whose product is a given square matrix.
Affine fixed, find the fixed point of an affine transformation.
Extend-subspace, extend a vector subspace to a required dimension.
OEF ohm, exercises on ohm's law and serial and parallel connections.
OEF combinatorics, collection of (numerical) exercises on combinatorics.
MatEq, solve matrix equations.
Quizz determinant, elementary questions on the determinant of a matrix.
Symmetric split, write a given matrix as sum of symmetric and antisymmetric matrices.
Transfinite arithmetic, transformation in Z/nZ by addition and multiplication.
Coinc_EqDif, graphical exercise about differential equations.
Coincidence Transformation, transform a given 2D shape into another given one.
Simu-bubble, manually simulate a bubble sort.
Graphical decrypt, decrypt a picture crypted by a psudo-random sequence.
Coincidence Addition, find the linear combination of two functions by their graphs.
OEF cartesian line 2D, collection of exercises on plane lines and their equations.
Practising with differentiation, Rehearsal material on differentiation.
OEF vectors 2D, collection of exercises on 2D vectors.
Limited derivatives, find the bound of a function having bounded derivative.
Flatten, parametrize a function to make it infinitesimal at a point.
Solving simple equations, Solving basic equations.
Radians degrees and unit circle, Practise with conversion of degrees and radians
Roottest, find the root of a function by successive tests.
OEF finite map, collection of exercises on maps between finite sets.
OEF proba, collection of exercises on elementary probability.
Polynomial order, computes the order of an irreducible polynomial over a finite field Fp.
Parametric draw, draw a parametric curve from graphs of coordinate functions, requires java.
Coincidence Polyroots, find a polynomial according to the positions of its roots.
Linear image, compute the image of a vector by a linear or affine map.
Graphic multiplication, recognize the graph of f(x)g(x) from that of f and g, etc.
Linsys find, establish a linear system according to a word problem.
OEF defining interval, collection of exercises on the defining interval of a real function.
OEF RSA, collection of exercises on the RSA cryptosystem.
Lissajous choice, recognize a Lissajous curve according to its equations, or vice versa.
Fourier development, graphical search of Fourier development of a function.
SQRT draw, draw roots of a complex number, requires java.
Lintersect, find the intersection of 2 lines, 2 planes, line and plane, etc.
Percentages, Calculate the percentage
Deductio inequalities 0, exercises of interactive deduction on inequalities, basic deductions.
Graphic abs, recognize the graph of f(|x|) from that of f(x), etc.
OEF factoris, collection of elementary exercises on the factorization of integers.
Trigonometry, the first steps in trigonometry.
Moving Comet Shoot, shoot the sun according to the motion of a comet (needs java).
Prime congruence base, find a prime for the base of a congruence relation.
OEF integrales with parameters, collection of exercices on integrals depending on a parameter
Hamming complement, Find a maximum of binary words respecting a given Hamming distance.
Calculating, priority rules on calculating.
Coincidence Param, find the best approximation of a parametric curve.
Solve second degree equations, Determine the roots of second degree equations
Parafocus shooting, shoot at the focus in the picture of a parabola
Domain and Range, Practicing with domain and Range.
OEF Entropy, collection of exercises on entropy.
Linear Relations, Lines and linear equations.
OEF forall, collection of exercises on logic quantifiers.
OEF RC, exercises on the bahavior of RC/RL circuit under sinusoidal signals.
Practising with Fractions, a lot of rehearsel material about fractions
Parametric cusp, parametrize a parametric curve so that it has a cusp.
Rankmult, find two matrices whose product is a given matrix.
Primpoly, search for primitive polynomials over a finite field.
OEF finite field, collection of exercises on finite fields.
Ray 3D, generates raytraced smooth 3D surfaces from parametric equations.
Reflaxis, find the axis of a reflection given by matrix, or vice versa.
Prog string, programming exercises on string processing.
Graphic ODE phase graph, recognize the phase graph of a given ODE.
Correcode, decode a message containing errors by an error correcting code.
OEF Varicode, collection of exercises on codes of variable length.
Coincidence sequence, find a sequence from partial informations and via successive tests.
Deductio linear system, exercises of interactive deduction on linear systems.
Working with units, Converting units
Inverse Huffman, find a distribution of probabilities so that a given code is optimal.
Varicode, find a code with given word lengths.
Prog sum of integers, programming exercises on summing a list of integers.
Deductio bounds, exercises of interactive deduction on (upper and lower) bounds of functions.
Asymptote, Determine the asymptotes of several functions.
Joint II, parametrize a function to make it continue or differentiable on 2 points.
Simple polynomials, third and higher degree simple polynomials
Introduction to Powers, practising with powers
Trigonometry: characteristics of the Sine and Cosine., Sine and Cosine: Amplitude,Frequency,Balance line and Minimum/Maximum
Prog divisibility, programming exercises on the divisibility of integers.
H4 series and sequences, Starting with series and sequences
Trigonometric graphs (Sine and cosine), Graph recognition (sine and cosine)
Prog modular arithmetics, programming exercises on modular arithmetics.
Variables, Working with variables
Trigonometry: determine the function, Use an applet to determine the correct arguments to a trigonometric function
Intersection and Inequality, about intersections and inequalities of several curves and lines.
Practising with Growth, practice with growth factors and percentages
Intersection points and Inequality, Intersection points and inequality between line and curves
Practicing with variables, simplify and rewrite with variables (H1/H2)
Practising with equations., working with equations based on:logarithms,roots,exponents,trigonometric
Practicing with integration, Rehearsal material on integration.
Graph-Relation, Given a piecewise linear graph y=f(x), determine the graph of f(x)=f(y)
Newton-Inverse, use Newton-Raphson algorithm to compute inverse value of a function and also the derivative of the inverse function
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