Small mistake pointed out by Jan.
Add reference for the proof of the Weil conjectures.
Change "easy fibre"
Add 'of'
Add 'of'
Replace 'hindsight'
Remove 'computational'
Add an unbreakable space '~'
Change 'theoretic' to 'theoretical'
Add precision names including N_3'
Change Phi_1 to Phi_{t_1}
Remove unnecessary variable b
Fix "computional"
Change 'g' to 's' on page 78.
Change word order 'we which shall' on p91.
Explain multinomial notation for monomial basis on p16.
Add missing space on p45.
Replace 'employability' by 'usefulness' on p65.
Add missing space on p65.
Add missing space on p77.