[Jprogramming] Order of operations

[David Ward Lambert]

Knuth up arrow notation for hyper exponentiation is such an operator.
Ken's paper cited by Roger predates this notation by 10 years.

> Date: Sat, 31 Jul 2010 11:21:57 -0400
> From: "Dan Bron" <j at bron.us>
> Subject: [Jprogramming] Order of operations
> To: "'Programming forum'" <programming at jsoftware.com>
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> How did the current mathematical order of operations (PEMDAS) arise?  
> 
> ...introduce a new operator in the chain + * ^, would it necessarily
> also have the highest precedence?