Tolle et lege

Saint Augustine is crying and in complete turmoil. He throws himself on the grounds and begs for God’s assistance. In a state of weeping, bitter contrition Augustine hears a child’s voice from a nearby house say, in a sing-song way, “Take it and Read it” Augustine, taking it as a sign, opens the nearest book, which was Paul’s letter to the Romans and reads. Says Augustine, “it was as though my heart was filled with a light of confidence and all the shadows of my doubt were swept away.”

Sunday, May 30, 2010

PI en San Pedro de Leiden

Sent to you by Ignacio via Google Reader:

PI en San Pedro de Leiden

via Turismo matemático by angelrequena on 5/26/10

En el año 2000 tuvo lugar en la Iglesia de San Pedro de Leiden una ceremonia singular: la recuperación (replica) de la lápida desaparecida de Ludolph van Ceulen, el matemático alemán afincado en Holanda que llegó a calcular 35 cifras decimales de pi

La lápida de piedra se ha adosado a una de las columnas del templo y contiene las treinta y cinco cifras obtenidas por Ludolph. La Iglesia inicial ha sufrido ruina y otros avatares. Tras su reforma es sede de colecciones, encuentros y restaurante.

En Alemania se ha conocido a pi como el número ludolfino. También es de resaltar que Ludolph van Ceulen se gano la vida como profesor de matemáticas y de esgrima. Los manuales de esgrima como aplicación de las matemáticas son una de las más pintorescas aportaciones de España al mundo. Cervantes en el Quijote y en El licenciado Vidriera se hizo eco de este curioso arte.

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"Stay Young" General MacArthur, 1945

Youth is not a time of life, it is a state of mind. It is a temper of the will, a quality of the imagination, a vigor of the emotions, a predominance of courage over timidity, of the appetite for adventure over the love of ease.

Nobody grows old by merely living a number of years. People grow old by deserting their ideals. Years wrinkle the skin, but to give up enthusiasm wrinkles the soul. Worry, doubt, self-distrust, fear and despair, these are the long, long years that bow the head and turn the growing spirit back to dust.

Whether seventy or seventeen there is in every beings heart the love of wonder, the sweet amazement of the stars and the starlight things and thoughts, the undaunted challenge of events and the childlike appetite for what’s next, and the joy and the game of life.

You are as young as your faith, as old as your doubt, as young as your self-confidence, as old as your fear. So long as your heart receives messages of beauty, cheer, courage, grandeur and power from the earth, from man, and from the infinite, so long you are young.