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[SPAM] [obm-l] Além dos complexos



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Nehab e Artur,

O eixo dos imaginários faz 90 graus com o eixo dos reais. No entanto,
podemos pensar que qualquer reta pertencente a um plano ortogonal ao eixo
dos reais também faz 90 graus com o eixo real. Ou seja, podemos ter
diferentes eixos imaginários j, k, etc, de forma que estes eixos sejam
distintos entre si e que  j^2 = -1, k^2 = -1. Um caso particular seria
aquele em  que o eixo dos reais, o eixo i e o eixo j sejam mutuamente
perpendiculares. Isso existe?

Um abraço,

Sérgio

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