Alvarus, Thomas, Liber de triplici motu, 1509

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71 quadrupla, valeat in tēpore finito pertranſiri a
potentia
vt .4. vt dictū eſt: nichilominus ſi dimi-
nuatur
talis reſiſtentia quo ad extenſionē ad ſub-
duplū
vel ad ſubtriplū .etc̈. ita efficiatur ſemipe­
dalis
, vel vna tertia, vel quarta, vel quinta: et ſic
in
infinitū: dūmodo partes reſiſtentie cõtinuo ma­
nent
in eadē ꝓportione in qua ſe habebant antea
puta
dupla: potentia vt .4. (intelligo ſemꝑ va-
riata
) in nullo tēpore finito valet talē reſiſtentiam
pertranſire
.
Patet facile ex primo correlario.
117. correĺ.
Sequitur ſeptimo / quãuis potentia vt .4. non
ſufficit
in tēpore finito pertranſire pedalē reſiſten­
tiam
diuiſam in partes ꝓportionales ꝓportione
dupla
: ad cuiꝰ primã habet ꝓportionē duplam et
ad
ſecundã ſexquitertiã et ad tertiã ſexquiſeptimã
et
ad quartã ſexquiquīdecimã et ſic in infinitum: vt
ponebatur
in caſu argumenti: nichilominꝰ tamen
talis
potentia ſufficit pertranſire in tēpore finito
reſiſtentiã
pedalē diuiſam in partes ꝓportiõales
ꝓportione
dupla ſimiliter: ad cuius primã habet
ꝓportionē
duplã et ad tertiã ſexquialterã et ad ter­
tiã
ſexquitertiã et ad quartã ſexquiquartã et ſic in
infinitū
aſcendendo per ſpecies ꝓportiõis ſuper-
particularis
nulla pretermiſſa.
Prima pars hu-
ius
correlarii probata eſt in argumento: et ſecūda
ꝓbatur
: q2 talis potentia in aliquo tēpore finito
ſufficit
pertãſire primã partē parē que eſt ſecūda
in
ordine: et in minori quã ſit equalis ſufficit ꝑtrã-
ſire
oēs ſequentes pares: et ſimiliter.
in aliquo tē-
pore
finito ſufficit pertranſire primã imparē: et in
minori
tēpore quã in triplo ad illḋ ſufficit pertrã-
ſire
oēs ſequentes impares: igitur oēs ſimul tam
pares
quã impares ſufficit ꝑtranſire in tēpore fi-
nito
.
Cõſequētia patet ex ſe / et arguitur maior / qm̄
ſi
illa potentia cõtinuo haberet ꝓportionē ſubdu­
plam
ad partē parem ſequentē ad illã ꝓportionē
quã
habet ad partē parem īmediate precedētem:
ↄ̨tinuo
ꝑtranſiret partē ſequentē parem in duplo
minori
tēpore quã īmediate precedentē ipſa ſit
ſubquadrupla
ad parē īmediate precedentem / et
cõſequens
ſi tranſiret primã parē in hora adequa­
te
: ſecundã parē tranſiret in media hora: et ſequē-
tem
parē in ſubduplo tēpore: et ſic oēs pares ꝓtrã­
ſiret
in duabus horis / vt patet ex quīto capite pri­
me
partis.
modo ad quãlibet ſequentē parē habet
maiorē
ꝓportionē quã ſubduplã ad ꝓportionem
quã
habet ad partē parē īmediate precedentē: igi­
tur
cõtinuo modo velocius mouebitur: et per con-
ſequens
minus quã in equali tēpore ꝑtrãſibit oēs
pares
ſequentes primã / quod fuit probandū.
Sed
iam
ꝓbo iſtã minorē videlicet / modo habet ad
quãlibet
partē parē ſeq̄ntē maiorē ꝓportionē quã
ſubduplã
ad ꝓportionē quã hꝫ ad partē parē īme­
diate
p̄cedentē.
Quod ſic ꝓbo / q2 ad primã parteꝫ
ꝓportionalē
parē que eſt ſecunda hꝫ ꝓportionem
ſexquialterã
: ad ſcḋam / eſt q̈rta hꝫ ꝓportioneꝫ
ſexquiquartã
.
Modo ſexq̇quarta eſt maior quam
medietas
ſexq̇altere.
Itē ad tertiã partē parē que
eſt
ſexta hꝫ ꝓportionē ſexq̇ſextã / vt ptꝫ ex caſu: mo­
do
ſexq̇ſexta maior eſt quã medietas ſexquiq̈rte / et
ſic
ↄ̨ñter / vt ptꝫ ex octauo correlario tertie ↄ̨cluſio­
nis
q̈rti capitis ſcḋe partis.
Sed ꝓbo maiorem
prīcipalis
argumēti videlicet / in aliquo tꝑe fini­
to
ſufficit ꝑtrãſire primã partē īparē: et in minori
quã
triplo oēs īpares ſequētes.
Qḋ ſic demõſtro /
q2
ſi ad quãlibet ſequētē īparē haberet ↄ̨tinuo ꝓ-
portionē
ſubtriplã ad ꝓportionē quã haberet ad
īparē
īmediate p̄cedentē / tūc ꝑtrãſiret oēs īpares
ſequētes
primã in triplo tardius quã primã ade-
quate: ita ſi trãſiret primã īparem in vna hora
oēs
īpares ſequētes primã in tribus horis adeq̈-
te
ꝑtrãſiret: ſed modo cõtinuo mouetur a maiori
ꝓportione
tranſeūdo aliquã partē imparē ſequē­
tem
primã quã tūc ꝑtranſeūdo eandē q2 continuo
a
maiori quã ſubtripla / igitur modo in minori tē­
pore
quã triplo ꝑtranſibit oēs īpares ſequentes
primã
quam primã.
Cõſequentia ptꝫ et maior ꝓ-
batur
: q2 ſi tranſiret primã imparē in hora: et trã­
ſecūdo
ſcḋam moueretur a ꝓportione ſubtripla
et
ipſa eſſet equalis prime: tūc in triplo tēpore ꝑ-
tranſiret
ipſam puta in tribꝰ horis: ſed modo il-
la
ſecūda pars ꝓportionalis impar eſt ſubqua-
drupla
/ ergo in ſubquadruplo tēpore modo ꝑtrã­
ſit
eam: et per ↄ̨ñs in ſubſexquitertio tēpore ad tē­
pus
in quo ꝑtrãſit primã.
Patet hec ↄ̨ña ex ſcḋo
correlario
quarte cõcluſiõis quarti capitis pre-
allegati
.
Et ſic ꝓbabitur de quibuſcū aliis dua­
bus
partibꝰ īparibꝰ: videlicet cõtinuo ꝑtranſi­
bit
quãlibet partē īparem ſequentē in ſexquiter-
tio
tēpore minori quã īmediate precedentē: et ſic ſi
tranſit
primã in hora oēs alias ꝑtranſit in tribꝰ
horis
/ vt ptꝫ intelligenti quintū caput prime par­
tis
.
Sed reſtat ꝓbare minorem videlicet / modo
cõtinuo
pertranſit a maiori ꝓportione quãlibet
partē
īparem ſequentem / quã tūc faceret eandem.
Quod ſic probo / qm̄ primã tranſit a ꝓportione
dupla
/ vt ptꝫ ex caſu: et ſecundã imparē que eſt ter-
tia
a ꝓportiõe ſexquitertia.
Modo ſexquitertia
maior
eſt quam ſubtripla duple: vt ptꝫ ex decimo
correlario
tertie ↄ̨cluſiõis q̈rti capitis p̄allegati.
Itē tranſit tertiã imparē que eſt quinta in ordine
a
ꝓportione ſexquiquinta.
Modo ſexquiquinta
maior
eſt quam ſubtripla īmo maior ꝙ̄ ſubdupla
ad
ſexquitertiã / vt ptꝫ ex octauo correlario eiuſdē
cõcluſiõis
/ et ſic cõſequēter / vt facile ꝓbat dictum
correlariū
/ igitur cõtinuo ꝑtranſit a maiori ꝓpor­
tiõe
quãlibet partē imparē quã tūc faceret eandē
Et ſic ptꝫ correlariū. 228. correĺ. Sequitur octauo / hec cõ­
ſequētia
nichil valet hoc mobile ſufficit ꝑtranſi-
re
hac reſiſtentia quãlibet partē ꝓportionalē
huiꝰ
pedalis: et quãlibet ſequentē in minori tēpo-
re
quã īmediate precedentē: igitur ſufficit trãſire
pedale
hac reſiſtentia.
Et loquor in antecedēte
de
partibus ꝓportionalibꝰ ꝓportione dupla ſe-
cundū
hanc diuiſionē.
Probatur correlariū / et vo­
lo
/ aliquod pedale diuidatur ꝓportione dupla
et
aliqua potētia puta et .8. gr̄a exēpli ſufficiat
ꝑtranſire
primã partē ꝓportionalē in hora: et ſe-
cundã
in media hora quarta. / et tertiã in media
hora
octaua: et quartã in media hora decīa
ſexta
: et ſic in īfinitū taliter / quãlibet preter pri-
ꝑtranſiret in media hora aliquo tꝑe vltra:
qḋ
tēpus vltra eſſet cõtinuo ſubduplū: quo poſito
ptꝫ totū correlariū.
Qm̄ manifeſtū eſt / requi­
rerent̄̄
īfinite medie hore ad ꝑtrãſeundū illud pe-
dale
: et q̄libet pars ꝓportiõalis ſequēs in mi-
nori
tꝑe ꝑtrãſit̄̄ quã īmediate p̄cedēs et quamlibet
ſufficit
pertranſire / vt notum eſt: igitur.
Tertio contra omnes concluſiones
ſimul
arguitur ſic: ille vel maior pars illarum
ſupponit
vnū falſū / ergo ſūt falſe.
Arguit̄̄ añs / q2
ſupponūt
aliquã reſiſtentiã poſſe vniformiter ſuc­
ceſſiue
diminui ab aliq̈ ponã: ſed hoc eſt poſſi-
bile
igit̄̄.
Minor ꝓbat̄̄ / q2 det̄̄ potētia vt .8. vni-
formiter
corrūpat et remittat reſiſtentiã vt .4. per
vnã
horã / et arguitur ſic: iſta potentia vt .8. remit-
tit
vniformiter in hora reſiſtentiam vt .4. / ergo in
medietate
hore remittit medietatē reſiſtentie: et

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