## FANDOM

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For technical reasons, "E#" redirects here. For the notation abbreviated as E#, see Hyper-E notation.

E or e may refer to:

• The mathematical constant e, approximately equal to 2.718
• Extensible-E System (ExE), a system of notations by Sbiis Saibian
• Hyper-E notation (E#), a notation by Sbiis Saibian with growth rate $$f_\omega(n)$$
• Extended Hyper-E Notation (xE#), a notation in ExE with growth rate $$f_{\omega^\omega}(n)$$
• Cascading-E notation (E^), a notation in ExE with growth rate $$f_{\epsilon_0}(n)$$
• Limited Extension Cascading-E Notation (LECEN), a notation in ExE with growth rate $$f_{\epsilon_\omega}(n)$$
• Extended Cascading-E Notation (xE^), a notation in ExE with growth rate $$f_{\varphi(\omega,0,0)}(n)$$
• Hyper-Extended Cascading-E Notation, a notation in ExE with growth rate $$f_{\varphi(1,0,0,0)}(n)$$
• Exploding Tree Function E(n), a googological function with growth rate $$f_{\omega+1}(n)$$
• A shorthand for scientific notation. For example, Avogadro's number can be written as 6.02E+23.
• The symbol for the SI prefix exa-
• Exceptional simple Lie groups, see 72, 78, 126, 133, 190, 240 and 248