[Guille]

Originally Posted by AntonioLao Spinors are two elements matrices. The twistors are 16 elements matrices.

Is there anything further from twistor theory, with more than 16 elements matrices?

[AntonioLao]

Twistors have the same number of elements as Einstein tensor of general relativity.

[Guille]

Originally Posted by AntonioLao Twistors have the same number of elements as Einstein tensor of general relativity.

Do tensors have more elements in matrix form than twistors?

[AntonioLao]

Originally Posted by GUILLE Do tensors have more elements in matrix form than twistors?

The answer is yes. But the Einstein tensor, the Riemann-Ricci tensor, the metric tensor of general relativity have the same number of elements as the twistor matrix, a 4 by 4 square matrix.

[Guille]

Originally Posted by AntonioLao The answer is yes. But the Einstein tensor, the Riemann-Ricci tensor, the metric tensor of general relativity have the same number of elements as the twistor matrix, a 4 by 4 square matrix.

Is the riemann-ricci tensor to do with the riemann hypothesis or the riemann zeta function, or the """"" integral, or the """"" manifolds, or the """"" mapping theorem, or the """""" surfaces, or the """""" sphere?

[AntonioLao]

The Riemann tensor of general relativity is that of differential geometry. The other Riemanns are from number theory.

[Guille]

Originally Posted by AntonioLao The Riemann tensor of general relativity is that of differential geometry. The other Riemanns are from number theory.

Differential geometry, great, for it is one of the maths I'm making myself to learn this year. But it will be of the very last, for before it I need to understand what makes it up, and understand what makes up those which make it up.

[AntonioLao]

differential geometry studies intrinsic (looking in) curvatures in contrast to extrinsic (looking out) curvatures.

[Guille]

Originally Posted by AntonioLao differential geometry studies intrinsic (looking in) curvatures in contrast to extrinsic (looking out) curvatures.

Let me guess: antiderivatives (or integrals) study extrinsic curvatures?

[AntonioLao]

I need to look it up. I am not sure about the antiderivative part.