# Know some special word in mathematics like “What is Gyroscope? What is Fathom? What is Hamming codes?”

**What is commensurable?**

Measureable in terms of same units. For example, a 20 centimeter length is
commensurable with 1 meter length as both can be measured in centimeters, but
the length of a side and that of a diagonal of a square are not commensurable.

**What is Greenwich Mean Time?**

The sun transits through all points on a meridian, hence
every point on an E-W line has different noon time, which gives the local time.
The earth may be thought as divide in zone each with a standard time based on
the local time of some meridian crossing the zone. Thus, each hour cover a time
extending across 15

^{0}of longitude. Noon at Greenwich is taken as noon in the British Isles, Portugal, morocco and a part of West Africa. Noon in central Europe is at 1.00 pm. G.M.T.**What is Gyroscope?**

Gyroscope is a rotating object that tends to maintain a fixed
orientation in space. For example, the axis of the rotation earth always points
in the same direction towards the Pole Star. A spinning top or a cyclist is
stable when moving at speed because of the gyroscopic effect.

**What is parseval’s theorem?**

The theorem of Fourier analysis standing that Bessel’s
inequality holds as equality for a square integrable function. The term is also
applied to extensions of this to any complete orthonormal sequence in a Hilbert
space, named after the French mathematician, marc Antoine parseval de chenes,
who had to flee France after his publication of poems critical of Napoleon.

**What is Fathom?**

A unit of length used to measure depth of water. It is equal
to 6 feet (1.8288 m)

**What is goodness to fit?**

The extent to which observed sample values of a variable
approximate to value derived from a theoretical distribution.

**What is Hamming codes?**

A class of efficient error correcting codes, usually binary
codes, that all the recipient to diagnose and correct a certain number of
transmission errors per word, with the change of a high proportion of errors in
negligible.

**What is Heuristic?**

It is based on trial and error, as for example some technique
in iterative calculations.

**What is Histogram?**

A statistical graph that represents, by the height of a
rectangular column, the number of times that each class of result occurs in a
sample or experiment.

**What is Hypocycloid?**

A curve described by a point on the circumference of a circle
as it rolls around the inside of another fixed coplanar circle. The form
depends on the ratio of the radii of the circles.

Know some special word in mathematics like “What is Gyroscope? What is Fathom? What is Hamming codes?”
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November 26, 2019
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