passage: Daya daga cikin karni na 14 Oxford Calculators, William Heytesbury, rasa bambanci lissafi da kuma ra'ayi na iyaka, samarwa don auna nan take gudun "by hanyar da za a bayyana ta [wani jiki] idan... shi aka koma uniformly a wannan mataki na gudun da abin da aka koma a cikin wannan baiwa lokaci".Heytesbury da sauransu mathematically ƙaddara da nisa rufe da wani jiki shan uniformly hanzari motsi (a yau warware ta hadewa), ya bayyana cewa "a motsi jiki uniformly samun ko rasa cewa increment [na gudun] za su haye a wasu lokaci da aka ba [nesa] gaba daya daidai da abin da zai haye idan aka motsi ci gaba a cikin wannan lokaci tare da talakawan mataki [na gudun]".Nicole Oresme a Paris da kuma Giovanni Casali Italiya da kansa bayar da diodes graphical dangantaka da wannan nan take gudun, wakiltar da cewa [wani jiki] da aka koma uniformly a wannan baiwa lokaci. William Heytesbury da sauransu mathematically ƙaddara da nisa rufe da wani jiki shan uniformly hanzari motsi (a yau warware ta hadewa), ya bayyana cewa "wani
lissafi na bambanci da ma'anar iyaka