Bessel Function of second kind :concepts (in bangla)

here Bessel Function of second kind :concepts (in Bangla) has been discussed. hope u will like . Thanks.
Some info:
Bessel functions for integer α are also known as cylinder functions or the cylindrical harmonics because they appear in the solution to Laplace's equation in cylindrical coordinates. Spherical Bessel functions with half-integer α are obtained when the Helmholtz equation is solved in spherical coordinates.

Bessel Function of the First Kind. The Bessel functions of the first kind are defined as the solutions to the Bessel differential equation which are nonsingular at the origin. They are sometimes also called cylinder functions or cylindrical harmonics.