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Math for the people, by the people.

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If my calculations are correct, PM users are afflicted by 13-phobia: there has never been a new addition to the PlanetMath encyclopedia on a Friday the 13th.

Though of course I could have miscalculated, I have miscalculated before. For example, I wanted a canonical object ID# that is a multiple of 13. I was off by 2.

Now to get rid of this object before any bad luck attaches to me.

It certainly is true of the previous Friday the 13th (on the 14th there was a major influx of new entries). But perhaps if we look far back enough we might be able to find one besides your entry today. Perhaps you ought to revise the statement in your entry to specify "professional mathematicians." Amateurs like us appear quite vulnerable to this psychiatric disorder!

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