I have this sentence:
Group theory is one of my favourite areas in mathematics, as evidenced by the fact that I chose to do two group theory modules in my undergraduate course.
I am wondering if it should be evident instead of evidenced.
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I believe the expressions should be "as evidenced by" and "as is evident from," respectively.
My preference, however, would be to opt for neither expression. Instead, I normally use "as demonstrated by." It's identical in meaning to the phrase you're trying to use, and there is little chance of either confusion or misuse, as is possible with the other expressions.