Bessel Functions 

Great introduction, thanks! Some noise rejection and more lectures please! :D

Thank you. This is very clear and well presented :-)

At 2:25 I think the approximation equation its supposed to be ( - n^2f) and not +

did she say euler maccaroni?? very concise and helpful video ...thanks :)

Good introductory on the solutions.

Awesome!! But distracting a bit as I can see you on the lower right corner.

great explanation!

AS engineer I would like that other applications to be mentioned (mainly linked to general laplacien type : electro mag potentials, wave equation, underground hydraulics,.. etc.,) and mainly that the research of a solution seemed to be triggered from the helmholtz eqn. Also please explain more about practically what is near 0. Sorry, I overlooked too hastily but I didn´t grasp the "ln" solution case (maybe too tired today). Please also, if legally allowable, mention the source of the series expansion demonstrations. Otherwise structured and clear but short.

Uhm for the definition of the Euler-mascheroni you have to substract one from the other, not add them, otherwise its will NOT converge

Very clear but puhleeeeze slow down.