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''[https://youtu.be/Z7rd04KzLcg?t=4263 01:11:03]''<br> | ''[https://youtu.be/Z7rd04KzLcg?t=4263 01:11:03]''<br> | ||
Is there a metric on \(U^{14}\)? Well, we both want one and don't want one. If we had a metric from the space of all metrics, we could define fermions, but we would also lock out any ability to do dynamics. We want some choice over what this metric is, but we don't want full choice, because we want enough to be able to define the matter fields to begin with. | Is there a metric on \(U^{14}\)? Well, we both want one and don't want one. If we had a metric from the space of all metrics, we could define fermions, but we would also lock out any ability to do dynamics. We want some choice over what this metric is, but we don't want full choice, because we want enough to be able to define the matter fields to begin with. | ||
[[File:X4 Fibers Metrics Diagram.jpg|thumb|right]] | |||
''[https://youtu.be/Z7rd04KzLcg?t=4282 01:11:22]''<br> | ''[https://youtu.be/Z7rd04KzLcg?t=4282 01:11:22]''<br> |