أكاديميا - كولنز - معاجم الجيب العلمية - الرياضيات - انكليزي -فرنسي -عربي الحرف ٢_ l

Academia - Collins - Pocket Scientific Dictionaries - Mathematics - English - French - Arabic Letter 2_ L

locus
lieu m géométrique

Locus. The path of a moving point.

The locus of a point, which moves so that it remains equidistant from two fixed points A and B, is the perpendicular bisector of the line connecting A and B.

logarithm
logarithme m

Logarithm. The logarithm of a number with a given base is the power to which the base must be raised to give that number. For example.

Logarithms of 10 are called common logarithms and are called logarithms of the base. (...2.718=e) Natural or Naperian logarithms. The natural logarithm function, usually written loge=x or In x, is an important function in the study of calculus.
Before the advent of calculators, logarithms were particularly useful because they transformed multiplication and division problems into addition and subtraction problems, respectively, thus saving time and tedious numerical work. For example.

longitude
longitude f

Longitude. A line of longitude is a semicircle drawn on the Earth's surface that connects the North and South Poles.

Longitudes form parts of great circles, that is, circles with the same radius (radius) as the Earth.

Just as latitudes are measured in degrees north and south of the equator, longitudes are measured in degrees east and west of Greenwich, where the longitude passing through the town of Greenwich near London (also known as the Greenwich meridian) is located.

If NPS represents the Greenwich line (20) in the above drawing and the angle POA is 30° and the angle POB is 20°, then all points on the NAS line are located on the 30° West longitude and all points on the NBS line are located on the 20° East longitude.

lower bound
limite f inférieure

Minimum. The lower bound of a set of numbers is the number less than or equal to each member of the set. For example: The lower bound of the set .... (1/2,1/3,1/4,1/5) is 0.

lowest
plus petit

smallest. 1 - The least common multiple of two or more numbers is the smallest number that divides them exactly. For example:

The least common multiple of 2, 3 and 4 is 12.

The least common multiple of 18 and 27 is 54.

The least common multiple of 8 and 16 is 16.

The least common multiple of x, 2x, and x2 is 2x2.

2 - The least common denominator of a set of fractions is the denominator that equals the least common multiple of all the denominators. For example:

The least common denominator of 3/4, 5/6, and 1/3 is 12.

The least common denominator of 1 + x / 2 and 1-4 / 2 is 1 - x2.

3 - A fraction is in its least term if it has been cancelled as much as possible. For example:

3/4, 5/7, 1/ x-1, and 3/x2
are fractions in their least terms.

But 6/9, 20/25, x-1 / x2-1, 3x/ x4
are not because they reduce to:
2/3, 4/5, 1/1+x, 3/x3
respectively.