ERRROR 1 was project about deconstruction television magazine ads. While deconstructing television magazine ads, mathematical constant Pi occured as a graphic patern.

In Euclidean plane geometry , ? (pi) may be defined either as the ratio of a circle 's circumference to its diameter , or as the ratio of a circle's area to the area of a square whose side is the radius. Advanced textbooks define ? analytically using trigonometric functions, for example as the smallest positive x for which sin ( x ) = 0, or as twice the smallest positive x for which cos ( x ) = 0.
All these definitions are equivalent, they amount to the following numerical value of ?, truncated to 50 decimal places (sequence A000796 in OEIS ): 3.14159 26535 89793 23846 26433 83279 50288 41971 69399 37510

The most pressing open question about ? is whether it is a normal number -- whether any digit block occurs in the expansion of ? just as often as one would statistically expect if the digits had been produced completely "randomly", and that this is true in every base, not just base 10. Current knowledge on this point is very weak; e.g., it is not even known which of the digits 0,.,9 occur infinitely often in the decimal expansion of ?.