Hi Freeman,

You can find a rather gentle introduction at 
https://scheme-book.ursliska.de/scheme/procedures/ and following sections.

Maybe you'll find the whole site a baluable reading as well.

HTH
Urs 

Am 25. Dezember 2019 06:47:48 MEZ schrieb Andrew Bernard 
<[email protected]>:
>Hi Freeman,
>
>Scheme is based in the lambda calculus. At some point, you need to
>learn Scheme to do everything you want in lilypond, in terms of
>extensions and so on. There's no avoiding it (well maybe, but...).
>Scheme is a wonderful elegant and powerful language, and efforts to
>learn it are repaid handsomely. But you don't need to become an expert
>in logic and lambda calculus. Lambda is the Greek letter, used heavily
>in formal logic. [Your question would tend to indicate you have not
>studied Scheme, unless I am mistaken - it would be hard to avoid
>lambda functions!]
>
>Many valuable resources here:
>
>https://schemers.org/
>
>
>
>Andrew
>
>On Wed, 25 Dec 2019 at 13:01, Freeman Gilmore
><[email protected]> wrote:
>>
>> I see this term 'lambda" used in lambda function, etc., to what does
>it refer?

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