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A person who doesn't let no one or nothing push them off track. They're like a math geek who won't let a problem mess with their flow.
@mathgeek2023: I'm an eagenvector. No one's gonna make me fail this test. I got a 100 last time.
DM from a friend: You're like an eagenvector. I tried to convince you to skip class, but you still went.
In a group chat: Sarah is an eagenvector. She stayed on her project even when we all got distracted.