Program of Lessons

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# Mathematical symbols dictionary

  identically equal,

  approximately equal,

~    approximately,

0.(12345)    the repeating decimal with the period 12345,

N   the set of natural numbers,

Z   the set of whole numbers (integers),

R    the set of real numbers,

  an empty set,

  an infinity sign,

  an element  belongs to a set  X,

  an element  doesn't belong to a set  X,

X Y   a set  X  is a subset of a set  Y,

  a union of sets  X and Y,

  an intersection of sets X and Y,

X \ Y   a symmetric difference of sets X and Y,

{ un }   a sequence with a general term  un ,

[ a, b ]    a numerical segment,

  numerical semi-segments (semi-intervals),

( a, b )    a numerical interval,

  a scalar product of vectors ,

  a vector product of vectors ,

==>     it follows,

<=>     equivalent,

  perpendicular,

  parallel,

  a triangle ABC,

  a function and its derivative.