# Difference between revisions of "User:Moosey/Googology"

## ah

### Part one: Starter notations

define \$_n as any entries (including no entries) in an array. It’s my symbol for we-don’t-care entries. In any one use of any one rule, if n is the same, \$_n is the same

a#b = concatenation of a and b

n@m =
n, m = 1
{n}#(n@(m-1)), m > 1, m not a lim ord
n@(m[n]) if m is a lim ord

g(a,n,B) =
ah_g(a-1,n,B) {B}, a > 1;
n, a = 0

### Basic ah rules

Rule 1.

ah^a_n {\$_0} = g(a,n,\$_0)

Rule 2.

ah_n ({\$_1}#{z}) = ah_n {\$_1}, z = 0

Rule 3.

ah_n{} = n+1

Rule 4.

ah_n{a+1,\$_2} = ah^n_n{a,\$_2}

Rule 5.

ah_n{a,\$_3} = ah_n{a[n],\$_3}, a a lim ord

Rule 6.

ah_n ((0@b)#{a+1,\$_4}) = ah_(n+1) (((a+1)@b)#{a,\$_4}), b > 0

Rule 7.

ah_n ((0@b)#{a,\$_5}) = ah_n ((a@b)#{a[n],\$_5}), a a lim ord & b > 0

### Notating enormous arrays

ah_n{\$_0//(b+1),\$_1} = ah_n(((\$_0)(@^_n)ah_n{\$_0//b})#{//b,\$_1})

ah_n{\$_0//0} = ah_n{\$_0}

ah_n{\$_0//b,\$_1} = ah_n{\$_0//(b[n]),\$_1} for lim ord b

Else: apply ah's 7 rules, starting after legion bar. (e.g. ah_{\$_0//,0,0,w+1} =

ah_{\$_0//,w+1,w+1,w})

(\$_1)(@^_n)a =

(\$_1)@(ah_n((\$_1)(@^_n)(a-1))), a > 1,

ah_n{\$_1}, a=1

ah_n{\$_0@@0} = ah_n{\$_0}

ah_n{\$_0@@a,\$_1} = ah_n{\$_0@@a[n],\$_1},a a lim ord

ah_n{\$_0@@(a+1),\$_1} = ah_n({\$_0//}#{\$_0@@(a),\$_1}

Apply basic ah rules otherwise to everything after the @@

ah_n{\$_0(@@b,\$_2)0} = ah_n{\$_0}

ah_n{\$_0((@@b,\$_2)a,\$_1} = ah_n{\$_0(@@b)a[n],\$_1},a a lim ord

ah_n{\$_0(@@0)(a+1),\$_1} = ah_n({\$_0//}#{\$_0(@@0)(a),\$_1}

ah_n{\$_0(@@b+1,\$_2)(a+1),\$_1} = ah_n({\$_0(@@b,\$_2)}#{\$_0@@(a),\$_1}

ah_n{\$_0(@@b,\$_2)\$_3} = ah_n{\$_0(@@b[n],\$_2)\$_3}, if b is a lim ord

Apply basic ah rules otherwise to everything after the (@@\$) or everything inside the (@@\$)

depending on what is necessary

These array rules can be applied without the ah_n of the array, but any n refers to the n in the ah

subscript.

#### Enormous array update

if unspecified, n is the subscript in the first (closest) ah that is in front of the array.

{\$_0//(b+1),\$_1} = (((\$_0)(@^_n)ah_n{\$_0//b})#{//b,\$_1})

{\$_0//0} = {\$_0}

{\$_0//b,\$_1} = {\$_0//(b[n]),\$_1} for lim ord b

Else: apply ah’s 7 rules, starting after legion bar. This includes nesting and incrementing the subscript (e.g. ah_n{\$_0//,0,0,w+1} = ah_(n+1){\$_0//,w+1,w+1,w})

(\$_1)(@^_n)a =

(\$_1)@(ah_n((\$_1)(@^_n)(a-1))), a > 1,

ah_n{\$_1}, a=1

{\$_0@@0} = {\$_0}

{\$_0@@a,\$_1} = {\$_0@@a[n],\$_1},a a lim ord

{\$_0@@(a+1),\$_1} = ({\$_0//}#{\$_0@@(a),\$_1}

Apply basic ah rules otherwise to everything after the @@. See legion bar notes for more details

{\$_0(@@b,\$_2)0} = {\$_0}

{\$_0((@@b,\$_2)a,\$_1} = {\$_0(@@b)a[n],\$_1},a a lim ord

{\$_0(@@0)(a+1),\$_1} = ({\$_0//}#{\$_0(@@0)(a),\$_1}

{\$_0(@@b+1,\$_2)(a+1),\$_1} = ({\$_0(@@b,\$_2)}#{\$_0@@(a),\$_1}

{\$_0(@@b,\$_2)\$_3} = {\$_0(@@b[n],\$_2)\$_3}, if b is a lim ord

Apply basic ah rules otherwise to everything after the (@@\$) or everything inside the (@@\$) depending on what is necessary. See legion bar notes for more details.

(Now things such as ah_n{a(@@(a(@@a)a))a} are well defined.)

{\$_0@@@(a+1),\$_1} = {\$_0(@@(\$_0@@@a,\$_1))\$_0,\$_1}

{\$_0@@@0} = {\$_0}

{\$_0@@@a,\$_1} = {\$_0@@@a[n],\$_1}, a a lim ord.

Apply ah rules otherwise

#### Dimensional arrays: 2D

{\$_0[]0} = {\$_0} {\$_0[]a+1,\$_1} = {\$_0@@@\$_0[]a,\$_1} {\$_0[]a,\$_1} = {\$_0,a[]a[n],\$_1}, a a lim ord {\$_0[]0@m,a+1,\$_1} = {\$_0[](ah_n{\$_0[](a+1)@m,a,\$_1})@m,a,\$_1} {\$_0[]0@m,a,\$_1} = {\$_0[]a@m,a[n],\$_1}, a a lim ord