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- impure.txt
-
- IMPURE MATHEMATICS
-
- Once upon a time (1/T) pretty little Polly Nomial was strolling across a
- field of vectors when she came to the boundary of a singularly large matrix.
-
- Now Polly was convergent, and her mother had made it an absolute condition
- that she never enter such an array without her brackets on. Polly, however,
- who had changed her variables that morning and was feeling particularly
- badly behaved, ignored this condition on the basis that it was insufficient
- and made her way in amongst the complex elements.
-
- Rows and columns closed in on her from all sides. Tangents approached her
- surface. She became tensor and tensor. Quite suddenly, two branches of a
- hyperbola touched her at a single point. She oscillated violently, lost all
- sense of directrix, and went completely divergent. As she reached a turning
- point, she tripped over a square root that was protruding from the erf and
- plunged headlong down a steep gradient. When she rounded off once more, she
- found herself inverted, apparently alone, in a non-euclidean space.
-
- She was being watched, however. That smooth operator, Curly Pi, was lurking
- inner product. As his eyes devoured her curvilinear coordinates, a singular
- expression crossed his face. He wondered, was she still convergent? He
- decided to integrate improperly at once.
-
- Hearing a common fraction behind her, Polly rotated and saw Curly Pi approach-
- ing with his power series extrapolated. She could see at once by his degen-
- erate conic and dissipative terms that he was bent on no good.
-
- "Arcsin!" she gasped.
-
- "Ho, ho," he said. "What a symmetric little asymptote you have. I can see
- that your angles have a lot of secs."
-
- "Oh, sir," she protested, "keep away from me. I haven't got my brackets on."
-
- "Calm yourself, my dear," said our suave operator. "Your fears are purely
- imaginary."
-
- "I, I," she thought. "Perhaps he's not normal by homologous."
-
- "What order are you?" the brute demanded.
-
- "Seventeen," replied Polly.
-
- Curly leered. "I suppose you've never been operated on?"
-
- "Of course not," Polly replied quite properly. "I'm absolutely
- convergent."
-
- "Come, come," said Curly. "Let's go off to a decimal place I know and I'll
- take you to the limit."
-
- "Never!" gasped Polly.
-
- "Abscissa!" he swore, using the vilest oath he knew. His patience was gone.
- Coshing her over the coefficient with a log until she was powerless, Curly
- removed her discontinuities. He stared at her significant places and began
- smoothing her points of inflection. Poor, poor Polly. The algorithmic method
- was now her only hope. She felt his hand tending to her asymptotic limit. Her
- convergence would soon be gone forever.
-
- There was no mercy, for Curly was a heavyside operator. Curly's radius
- squared itself; Polly's loci quivered. He integrated by parts. He integrated
- by partial fractions. After he cofactored, he performed Runge-Kutta on her.
- The complex beast even went all the way around and did a contour integration.
- Curly went on operating until he had satisified her hypothesis; then he
- exponentiated and became completely orthogonal.
-
- When Polly came home that night, her mother noticed that she was no longer
- piece-wise continuous, but had been truncated in several places. But it was
- too late to differentiate now. As the months went by Polly's denominator
- increased monotonically. Finally, she went to L'Hospital and generated a
- small but pathological function which left surds all of the place and drove
- Polly to deviation.
-
- The moral of the sad story is: "If you want to keep your expressions
- convergent, never allow them a single degree of freedom!"
-
- -- Aunty Derivative