Blair’s Reviews > A Most Incomprehensible Thing: Notes Towards a Very Gentle Introduction to the Mathematics of Relativity > Status Update
Blair
is on page 73 of 334
All the math we will need is crammed into the first chapter. It is more an introduction to notation than an explanation of what it means. I would rather learn the math as needed, in the context of the physics, instead of an abstraction. Not a good start.
— Nov 29, 2015 06:33AM
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Blair’s Previous Updates
Blair
is on page 84 of 334
The section on gravity leaves one with the impression that the Moon orbits the Earth. Wrong, they both rotate around a common centre of mass. Gravitation reveals a fundamental symmetry - every atom in the universe is attracted to every other atom. The Earth and Moon attract each other, and momentum is conserved by rotating around the centre of mass. The role of symmetry and momentum is left out of his description.
— Dec 05, 2015 06:31AM
Blair
is on page 80 of 334
Newton's laws of motion are introduced the same way they have been for centuries. You think it might be worth mentioning that they are all instances of a more fundamental principle - the conservation of momentum. They make a lot more sense from that perspective.
— Nov 29, 2015 10:07AM
