Monthly Archives: October 2020

Spacetime volumes

Spacetime volumes

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Twins paradox

Twins paradox

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Spacetime diagrams

Spacetime diagrams

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General boosts and rotations

General boosts and rotations

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Lorentz boosts

Lorentz boosts

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Doppler shift derived without Lorentz transformations

Doppler shift derived without Lorentz transformations

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3-Metric as a projection tensor

3-Metric as a projection tensor

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Frame-Independent Expressions for Energy, Momentum and Velocity

This is a repost of an earlier problem from Misner, Thorne & Wheeler which happens to be the same as the problem in Thorne & Blandford: Frame-Independent Expressions for Energy, Momentum and Velocity

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Slot-naming index notation and index gymnastics

Slot-naming index notation and index gymnastics

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Numerics of component manipulations

Numerics of component manipulations

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