75 Premier League matches and scored 8 goals. He also has the experience of playing for England at U20 and U21 age groups.

Manchester United is believed to have a very little transfer budget. So, they can not spend as heavily this summer as they were used to in the past. In fact, Ferguson is now planning to sell two underperformed players Dimitar Berbatov and Anderson to arrange a handsome transfer kitty so that he can spend further to strengthen the squad.

While Rio Ferdinand is getting older, and Nemanja Vidic has become a target of some other clubs including Real Madrid, Ferguson has every reason to be concerned about his back line which suffered a lot due to persistent injury problems almost throughout the last season.

So, it is understandablerecently become important due to the development of telegraphs, power lines, telephones, radar, and x-ray diffraction, it seems plausible that he was one of the earliest to publish on deconvolution through the Fourier transform. The Mellin and Laplace transforms and deconvolutions are better suited for development of the operational/algebraic calculus explored by Lebnitz, Euler, and dozens after them.)
C) Operational calculus, fractional calculus, differential algebra:
For Heaviside's operator calculus (and use by Dirac), see the discussion, references, and comments at Ron Doerfler's post at his website Dead Reckonings. (Synowiec is also cited below, and see this note by Davis on Bromwich's views  of the Heaviside calc.)
For differential algebra in general, read "Some highlights in the development of algebraic analysis" by Synowiec in which symbolic methods, the Heaviside calc, and