lightlike
plural of co-brother
(mathematics) (of a four-vector) Having a space component whose magnitude is equal to its time component multiplied by the speed of light.
plural of tidewater
A surname.
ミンコフスキー計量において、その四元ベクトルは光様（ノルムがゼロ）であり、その空間成分の大きさが時間成分に光速を掛けた値と等しい。
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DiQt
Free
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