My physics professor used a symbol in his notes that I was unfamiliar with, and so far the closest thing I have found to it is the propto. The only difference is that my prof used it vertically, with the open side up. I'm wondering if this is a different symbol entirely, or if he just tipped it for fun. Any input is greatly appreciated. [PLAIN]http://imagebin.org/index.php?mode=image&id=86532 [Broken] [Broken] The image doesn't appear to be loading, so here's just the link [PLAIN]http://imagebin.org/index.php?mode=image&id=86532 [Broken] [Broken] That's a picture of his symbol and he used it. Thanks in advance!