domain:arts,biology,chemistry,earth_sciences,history,informatics,\
  language,mathematics,physics,sciences,civic_education

sciences:

civic_education:

mathematics:elementary_mathematics,algebra,analysis,geometry,probability,statistics,\
 discrete_mathematics,financial_mathematics,number_theory,operational_research

biology:biochemistry,botanics,cell_biology, ecology,genetics,histology,\
  immunology,medecine,mycology,phylogenetics

arts:music,weaver

chemistry:biochemistry,cristallography,inorganics_chemistry,\
  organics_chemistry,thermodynamics

language:english, french, german, listening,grammar,phonetics,spelling,\
  speaking,reading,vocabulary,linguistics,etymology

english:american_civilisation,pronunciation,written_english,business_english,\
  technical_language

french:french_grammar,french_conjugation,french_spelling

earth_sciences:geography,geology

informatics:information_theory,coding,cryptology,combinatorics,\
  linear_optimisation,algorithmics,programming

information_theory:error_detection,entropy,hamming,error_correcting_codes

elementary_mathematics:pbsolving,measurement,number,elementary_geometry,data_gestion

discrete_mathematics:graph,combinatorics,logic
logic:set_theory, maps
arithmetic:integers, modular_arithmetic, gcd_lcm, factorization,\
  diophantine_equations, goldbach,continued_fraction

number:operation,fraction,numbering_system, percents, proportionality,decimals,\
  exponent, scientific_notation,methodical_calculation, rational_number

measurement:angles, area, volume, time
elementary_geometry:2_shape, 3_shape, symmetry

complex_number:real_number, numbering_system, trigonometry,complex_plane

algebra:elementary_algebra,linear_algebra,abstract_algebra,arithmetic,coding

abstract_algebra:group_theory,ring,field

group_theory:quotient_group, symmetric_group,group_action,cyclic_group,\
   finite_group,abelian_group

linear_algebra:matrix, determinant, linear_systems, vectors, vector_space,\
 bilinear_algebra,endomorphism_reduction

elementary_algebra:relative_number,complex_number,equations, polynomials, roots,\
 factorization

analysis:elementary_calculus,calculus,vectorial_analysis,complex_analysis,\
  differential_equation

complex_analysis:complex_plane,homography

elementary_calculus:inequalities, functions, roots, equations, trigonometry
functions:exponential, logarithm
calculus:limit,continuity,real_function,sequence,taylor_series, fourier_series,\
  fourier_transform
real_function:derivative,integral, primitive, definite_integral,\
  taylor_expansion, differential_equation
differential_equation:ode,differential_system
geometry:euclidean_geometry,analytic_geometry,affine_geometry,\
  algebra_geometry,algebraic_geometry,differential_geometry

differential_geometry:tangent
affine_geometry:line, plane, hyperplane
euclidean_geometry:lines, circles, rectangles, polygons, triangles, angles, symmetry
analytic_geometry:surfaces, curves, parametric_curves, polar_curves, conics,\
  parabola,hyperbola,ellipse,circle,lissajous,graphing
algebra_geometry:isometries,transformation_group,similarities
combinatorics:factorial, combination, permutation
differential_geometry:
probability:random,probability_space,random_variable,markov_chains,\
  simulation
random_variable:probability_distribution
probability_space:conditional_probability,events,combinatorics
statistics:data_analysis,descriptive_statistics,estimation,\
  statistical_test,confidence_interval,probability_distribution,simulation
descriptive_statistics:mean,percentage,histogram

physics:cinematics,dynamics,electricity,electronics,electrostatics,\
  fluid_mechanics,gas_mechanics,magnetism,mechanics,optics,thermodynamics,vibration
