fix a lot of style issues authored by Philipp Rüssmann's avatar Philipp Rüssmann
###### Basic theory {#basic_theory}
# Basic theory
` - `[`The`` ``Green`` ``function`` ``method`](The_Green_function_method "wikilink")\
` -`[`The`` ``Green`` ``function`` ``approach`](The_Green_function_approach "wikilink")\
` -`[`Free`` ``Green`` ``function`](Free_Green_function "wikilink")\
` -`[`Boundary`` ``condition`](Boundary_condition "wikilink")\
` - `[`Scattering`` ``theory`](Scattering_theory "wikilink")` `\
` -`[`Single-site`` ``scattering`](Single-site_scattering "wikilink")\
` -`[`Multiple`` ``scattering`](Multiple_scattering "wikilink")\
` - `[`KKR`` ``as`` ``Green`` ``function`` ``method`](KKR_as_Green_function_method "wikilink")\
` - `[`Dyson`` ``equation`](Dyson_equation "wikilink")\
` - `[`KKR`` ``secular`` ``equation`](KKR_secular_equation "wikilink")` `\
` - `[`Full`` ``potential`` ``treatment`` ``within`` ``KKR`](Full_potential_treatment_within_KKR "wikilink")\
` - `[`Total`` ``energy`](Total_energy "wikilink")\
` - `[`Charge`` ``density`](Charge_density "wikilink")\
` - `[`Band`` ``energy`](Band_energy "wikilink")\
` - `[`Exchange-correlation`` ``energy`](Exchange-correlation_energy "wikilink")
- [The Green function method](The_Green_function_method)
- [The Green function approach](The_Green_function_approach)
- [Free Green function](Free_Green_function)
- [Boundary condition](Boundary_condition)
- [Scattering theory](Scattering_theory)
- [Single-site scattering](Single-site_scattering)
- [Multiple scattering](Multiple_scattering)
- [KKR as Green function method](KKR_as_Green_function_method)
- [Dyson equation](Dyson_equation)
- [KKR secular equation](KKR_secular_equation)
- [Full potential treatment within KKR](Full_potential_treatment_within_KKR)
- [Total energy](Total_energy)
- [Charge density](Charge_density)
- [Band energy](Band_energy)
- [Exchange-correlation energy](Exchange-correlation_energy)