В сочинении «Книга вычислений» (Liber Calculationum) Хейтсбери даёт следующее определение мгновенной скорости:
Библиография
- 1483 - De probationibus conclusionum tractatus regularum solvendi sophismata -, Pavia 1483
- De probationibus conclusionum tractatus regularum solvendi sophismata (On the Proofs of Conclusions from the Treatise of Rules for Resolving Syllogisms)
- Liber Calculationum
- 1335 - Regulae solvendi sophismata (Rules for Solving Sophisms)
- 1. On insoluble sentences
- 2. On knowing and doubting
- 3. On relative terms
- 4. On beginning and ceasing
- 5. On maxima and minima
- 6. On the three categories
- De tribus praedicamentis