NNLO matching functions for PDFs

Classes
class	apfel::C2nsppdf
	The O(αs2) valence plus matching function for PDFs (reference: https://arxiv.org/pdf/2012.03256.pdf). More...
class	apfel::C2nsmpdf
	The O(αs2) valence minus matching function for PDFs (reference: https://arxiv.org/pdf/2012.03256.pdf). More...
class	apfel::C2pspdf
	The O(αs2) pure-singlet matching function for PDFs (reference: https://arxiv.org/pdf/2012.03256.pdf). More...
class	apfel::C2qgpdf
	The O(αs2) quark-gluon matching function for PDFs (reference: https://arxiv.org/pdf/2012.03256.pdf). More...
class	apfel::C2gqpdf
	The O(αs2) gluon-quark matching function for PDFs (reference: https://arxiv.org/pdf/2012.03256.pdf). More...
class	apfel::C2ggpdf
	The O(αs2) gluon-gluon matching function for PDFs (reference: https://arxiv.org/pdf/2012.03256.pdf). More...

Detailed Description