Caution: Contains Functional Sharp Point (idea) by sockpuppet

And here I was clicking on this node thinking that I was going to find a warning not to attempt to differentiate a function which is continuous but is not smooth in its first derivative, eg: f(x) = abs(x*ln(x²)) in a neighborhood around x=0 looks like:



                         .      |     .
                                |
                                |    
                            .   |   . 
                                |    
                                |   
                              . | .     
                                |     
                                |
                               .|.
                                |
                                .
                 --------------------------------

Which many calculus textbooks call a function with a "sharp point". The limit of f'(x) from the left is minus infinity, and from the right is plus infinity, so from an analysis standpoint this is the sharpest point you can have. Be careful!

I leave it to Hallmark as an exercise to come up with other math warnings: CAUTION: NON-REMOVABLE DISCONTINUITY, etc.

The three fatal knife targets above the shoulders	stupid consumer warnings	Escalator dilemma	Indigenous peoples of downtown Wal-Mart
Hyakugojyuuichi	With this plant I can take on the world	three cop car barrier	stack underflow
a dangerous toy	Stuff to Do with Your Own Blood 101	Needles, California	Do not attempt to stop chain with your hands or genitals
dysfunctional	Don't	Learning from experience	warnings
differentiate	Singularity	Even your mother will probably bite your tree hand when you destroy all gravity	Geography of the Islands of the Dead
Micro or macro, we have the means to kill you	April 24, 2004	Contributing to an expensive farewell gift for your rich, rich boss	heard at Wal-Mart