UNDER THE DOUBLE INTEGRAL
Once upon a time (1/t) pretty little Polly Nomial was strolling across a field of vectors when she came to the edge of a singularly large matrix.
Now Polly was convergent and her mother had made it an absolute condition that she must never enter 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 grounds that it was insufficient and made her way among the complex elements.
Rows and columns enveloped her on all sides. Tangents approached her surface. She became tensor and tensor. Quite suddenly three 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 which was protruding from the erf and plunged headlong down a steep gradient.
When she was differentiated once more, she found herself apparently alone in a non Euclidian 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. Was she still convergent, he wondered. He decided to integrate improperly at once.
Hearing a vulgar fraction behind her, Polly turned around and saw Curly Pi approaching with his power series extrapolated. She could see at once by his degenerate conic and his dissipative terms that he was bent on no good.
"Eureka!!" she gasped.
"Ho, ho", he said. "What a symmetrical little polynomial you are. I can see you're absolutely bubbling over with 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 is homogeneous, then."
"What order are you?", the brute demanded.
"Seventeen", replied Polly.
Curly leered, "I suppose you have never been operated on yet?"
"Of course not", replied Polly indignantly. "I'm absolutley 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.
"EXCHHLF", 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 Polly. All was up. 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. He integrated by parts. He integrated by partial fractions. The complex beast even went all the way round and did a contour integration. What an indignity. To be multiply connected on her first integration. Curly went on operating until he was absolutely and completely orthogonal.
When Polly got home that evening her mother noticed that she had been truncated in several places. But it was too late to differentiate now.
As months went by, Polly increased monotonically. Finally she generated a small, but pathological function which left surds all over the plane until she was driven to distraction.
The moral of our sad story is this: If you want to keep your expressions convergent, never allow them a single degree of freedom.
Obtained from a photocopy from Matrix which included the following editor's note: 'The following first appeared in Neutrino, September 1971, and is reprinted with permission. From the original: "It is taken from a duplicated version of a tenth generation photocopy, author unknown. Our thanks, unknown."'