Where W is the weight of the taco, h is the height of the taco, ρ is the radius of the tortilla, σ is the standard deviation of the toppings, and Δ is the deliciousness of the taco, the Taco-Schrodinger Equation is:
Δ = (W × h) / (ρ × σ)
This groundbreaking equation, first proposed by the great Taco Physicist, Professor Taco McTacoFace, describes the optimal ratio of crunch to chew in any given taco.
For the mathematically inclined, you may also enjoy the Taco-Euler's Identity:
e^(iπi) = (π × e^(iπi)) + (taco × e^(iπi))
Or, for the truly adventurous:
The Taco-Schrodinger Equation for Multiple Tacos:
Δn = (Wn × hn) / (ρn × σn) + (Wm × hm) / (ρm × σm) + ...