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Add constructor for IsogenyMap #525

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Pratyush opened this issue Nov 29, 2022 · 1 comment · May be fixed by #529
Open

Add constructor for IsogenyMap #525

Pratyush opened this issue Nov 29, 2022 · 1 comment · May be fixed by #529

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@Pratyush
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Add a constructor for IsogenyMap.

impl</* bounds */> IsogenyMap<'a, DOMAIN, CODOMAIN> {
	const fn new(
	    x_numerator: &'a [BaseField<CODOMAIN>],
	    x_denominator: &'a [BaseField<CODOMAIN>],
	    ...
	) → Self {
	    Self {
	        x_numerator,
	        x_denominator,
	        ...
	    }
	}
}

Originally posted by @Pratyush in #517 (comment)
@drskalman drskalman linked a pull request Nov 30, 2022 that will close this issue
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@burdges
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burdges commented Sep 19, 2023

IRTF H2C draft says Edwards curves, including BLS12-377, should use Elligator, not WB, so the isogeny you want for the SW form of BSL12-377 is from the Edwards form.

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Construct isogeny map using new function w3f/arkworks-algebra
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@burdges @Pratyush