The decadumel[1] is equal to 10[[10]] in copy notation.
How to get this number[]
To get a1, just write "10".
To get a2, write "10" a1 times. It will be 10101010101010101010, or decamel.
To get an, write "10" an-1 times.
Then, a10 is the decadumel.
Approximations[]
| Notation | Approximation |
|---|---|
| Up-arrow notation | \((10\uparrow)^9 20\) |
| Hyper-E notation | \(\textrm{E}20\#9\) |
| Fast-growing hierarchy | \(f^9_2(63)\) |
| Hardy hierarchy | \(H_{\omega^2 \times 9}(63)\) |
| Slow-growing hierarchy | \(g_{\varepsilon_0}(10)\) |