I hear ya, MM -- and as for five-dimensional Yukawa coupling, I have never mastered it. I hear it is something you have to be born into, as it were, like a taste for Chinese fried grasshoppers. Amateurs and foreigners who have ventured to the Yukawa tribal lands to learn it are usually reported to have seriously injured themselves, if they report back at all. I understand it is the fifth dimensional rotation that really cooks it.

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