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While preparing for next week's tutorials I found this little fellow sneaking around on my page.
For scale, the line is about half a millimetre thick, and in the photo with writing the type face is 12 point.
Really bored in maths the other day so I drew this in the back of my book. Photo taken on my phone and then awesomized in GIMP 2.6
Cover of a math book from the state of California. Dad was a math teacher for >50 years so he seemed to have accumulated old math books but despite the rumors, he probably didn't teach from this book...
My last day with this math textbook (at our school, we borrow them, and return on the exam day). Funnily, the previous owner often scribbles answers, and random things. Like this one for example, it says, "22 = v. Right? RIGHT."