Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 12]

▼Nnestedsums
Cbasic_letter	A basic_letter is an element of an alphabet
CBsum	Bsums arise from Hoelder convolutions
Cclassical_polylog	A classical polylog is a special case of a Nielsen polylog
CCsum	Csums involve a conjugation
CEuler_Zagier_sum	A Euler-Zagier sum is a special case of a Zsum
Cexpand_request	Flags for the nestedsum_helper_expand function
Cexpand_status	Flags for the status of the expansion
Charmonic_polylog	A harmonic polylog is a special case of a multiple polylog
Charmonic_sum	A harmonic sum is a special case of a Ssum
Charmonic_sum_to_Infinity
Chash_entry	This class provides a container for expressions to be stored in hash tables
Cletter	A letter is a basic_letter with offset=0
Clist_of_tgamma	The class list_of_tgamma is a container for the class ratio_of_tgamma
Cmap_insert_Zsums
Cmap_remove_Zsums
Cmultiple_polylog	A multiple polylog sum is a special case of a Zsum
Cmultiple_zeta_value
Cnestedsums_helper_less
Cnestedsums_status_flags	Additional status flags
Cnielsen_polylog	A Nielsen polylog is a special case of a harmonic polylog
Cprint_format	Flags for the print format for polylogs
Cratio_of_tgamma	The class ratio_of_tgamma contains the ratio of two Gamma functions
Croot_of_unity
CSsum	Ssums form an algebra
CSsum_to_Infinity	A Ssum_to_Infinity is a special case of a Ssum
Ctranscendental_fct_type_A
Ctranscendental_fct_type_B
Ctranscendental_fct_type_C
Ctranscendental_fct_type_D
Ctranscendental_sum_type_A
Ctranscendental_sum_type_B	The class transcendental_sum_type_B may contain and
Ctranscendental_sum_type_C	The class transcendental_sum_type_C involves a conjugation
Ctranscendental_sum_type_D
Cunit_letter	A unit_letter is a letter whose letter content equals 1
CZsum	Zsums form a Hopf algebra