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Hi Bob
I could not resist you signature and I envy the fact that you are lost in Calabi - Yau space as not many us can enter this space intellectually. If your position is taken literally, it will make Alice in Wonderland a mere walk in the park. I am still struggling with the tensors. If you were in Sydney I would like to buy you lunch and discuss rigorous geometries. In any case if you are in Sydney lunch is on me.
This hobby of ours is great as you can go from griding mirrors, to indulge yourself in a visual feast of astronomical objects, to spacetime geometries to cosmology and to exotic superstring theories.
Best regards
George (astrolabe)
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