Holonomic Constraint 

In classical mechanics, particularly Lagrangian Mechanics, a holonomic constraint is a special type of constraint of motion. It restricts the trajectory of a system of particles to a smooth manifold Q by the set smooth equations

a({x},t)=0
b({x},t)=0
.
.
.
Where
t=time
{x}= the set of 3N Cartesian coordinates for the system of N particles.

For N particles, the number of holonomic constraints must be less than 3N using the assumption that each equation has an explicit dependence to AT LEAST one coordinate.

A rigid body, defined by the constraint equations (using LaTeX) is

\left| {x_i - x_j } \right| - c_{ij} = 0
where i is not equal to j is a Holonomic Constraint.

Holonomic Constraint by pinu7 November 11, 2009

Wadsworth Constant 

The Wadsworth Constant is the fundamental idea that the true meaning of a video, conversation, or comment approaches importance after approximately 30% of it has been skipped over.

The above definition, for instance, has 180 characters. After applying the Wadsworth Constant, we skip over 52 characters (29%). The definition now reads,
"the true meaning of a video, conversation, or comment approaches importance after approximately 30% of it has been skipped over."

Wadsworth Constant by ShigalHammoud October 2, 2011

Karpathy Constant 

The Karpathy constant is one of the best learning rates for the popular Adam (deep neural network) optimizer. It is defined as η = 3e-4. The actual symbol for the constant is α_k.

What is the correct learning rate for adam in this case?

Just use the Karpathy constant dude

Karpathy Constant by WonderingNeuron November 23, 2017

Jens's Constant 

The result when summing all the divisors of the numbers from 1 to 9. Seems to be a fundamental constant of nature, since it occurs many times on the Internet.

Youtube Poll:
69% yes
31% yesn't
Jens's Constant, nice ( ͡° ͜ʖ ͡°)

Jens's Constant by sevenfour March 2, 2021

Bulgarian constant 

Basically anything which makes your result correct. (In Bulgaria they call this "coefficient of adjustment".)

your actual result × Bulgarian constant = expected result

Bulgarian constant by tomask July 7, 2021

Minecraft universal constant

This number is a gigantic number coined by Austin from "The Science" series of Game theorists youtube channel . It is the number of all permutations in all minecraft worlds. Its value is 10^10^10^1.3134

Hey, did you see the mind boggling gigantic number, The minecraft universal constant, that Austin from the game theorists calculated.

Minecraft universal constant by LORD ASHU December 10, 2020

constantina 

the most beautiful and wonderful greek girl you will ever meet. she has the best personality and is sweet heartwarming girl. she is so gorgeous that all men are attracted to her. has bangingg boddy and is a living and breathing greek goddess. she is overall the most beautiful and amazing girl in the whole enitre universe.

who's that sexaaayy thanng?

OH thats Constantina!

constantina by anonymous7456789 September 29, 2011