• Critical point (mathematics)
  Critical point (mathematics)
  In calculus, a critical point of a function of a real variable is any value in the domain where either the function is not differentiable or its derivative is 0. The value of the function at a critical point is a critical value of the function...
  
  
• Critical point (set theory)
  Critical point (set theory)
  In set theory, the critical point of an elementary embedding of a transitive class into another transitive class is the smallest ordinal which is not mapped to itself....
  
  
• Critical point (thermodynamics)
  Critical point (thermodynamics)
  In physical chemistry, thermodynamics, chemistry and condensed matter physics, a critical point, also called a critical state, specifies the conditions at which a phase boundary ceases to exist...
  
  
• Construction point
  Construction point
  The construction point, also known as the critical point, calculation point, K-point and K-spot, is a line across a ski jumping hill which indicates the hill's steepest point in meters. It was formerly used to classify the size of a ski jumping hill, and to calculate the number of points granted by...
  
   of a ski jumping hill

See also

• Brillouin zone
  Brillouin zone
  In mathematics and solid state physics, the first Brillouin zone is a uniquely defined primitive cell in reciprocal space. The boundaries of this cell are given by planes related to points on the reciprocal lattice. It is found by the same method as for the Wigner–Seitz cell in the Bravais lattice...
  
  
• Percolation thresholds