Book 1, Proposition 9.
On the Equilibrium of Planes
“The centre of gravity of a parallelogram is the point of intersection of its diagonals.”
—
Archimedes
,
book
On the Equilibrium of Planes
Book 1, Proposition 10.
On the Equilibrium of Planes
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Archimedes 20
Greek mathematician, physicist, engineer, inventor, and ast… -287–-212 BCRelated quotes
Book 1, Proposition 14.
On the Equilibrium of Planes
Book 1, Proposition 4.
On the Equilibrium of Planes
of the portion adjacent to the base
Proposition presumed from previous work.
The Method of Mechanical Theorems
“The centre of gravity of any cylinder is the point of bisection of the axis.”
Proposition presumed from previous work.
The Method of Mechanical Theorems
Book 1, Proposition 13.
On the Equilibrium of Planes
Hans Freudenthal
(1905–1990) Dutch mathematician
Source: Mathematics as an Educational Task (1973), p. 133
Vol. 2 "Further Psychological Observations" as translated in Essays and Aphorisms (1970), as translated by R. J. Hollingdale
Parerga and Paralipomena (1851), Counsels and Maxims
Pierre Teilhard De Chardin
(1881–1955) French philosopher and Jesuit priest
This is how it has been understood by the great philosophers from Plato, the poet, to Nicolas of Cusa and other representatives of frigid scholasticism. Once this definition has been accepted, it gives rise to a series of important consequences. Love is power of producing inter-centric relationship. It is present, therefore (at least in a rudimentary state), in all the natural centres, living and pre-living, which make up the world; and it represents, too, the most profound, most direct, and most creative form of inter-action that it is possible to conceive between those centres. Love, in fact, is the expression and the agent of universal synthesis.
pp. 70–71 https://archive.org/stream/ActivationOfEnergy/Activation_of_Energy#page/n65/mode/2up
Activation of Energy (1976)
Proposition 6.
The Method of Mechanical Theorems