What is this symbol?

[sarikei]

Hello, I hope this isn't inappropriate to post here. I'm trying to make a piece of math art for a Christmas present, but I'm an art person, not a math person, and I can't quite make out this symbol in the image I'm using for inspiration. If someone could tell me what it is so I can draw it, I would be very grateful!

 

[pka]

Hello, I hope this isn't inappropriate to post here. I'm trying to make a piece of math art for a Christmas present, but I'm an art person, not a math person, and I can't quite make out this symbol in the image I'm using for inspiration. If someone could tell me what it is so I can draw it, I would be very grateful!

View attachment 3545

I cannot read your image. But the curve in question is \(\displaystyle y=4-x^2\).

 

[sarikei]

Fantastic, thank you. Just looked like a black goldfish cracker to me.