As verbs the difference between shown and presented
is that shown is past participle of lang=en while presented is past tense of present.
As a proper noun Shown
is {{surname|lang=en}.
As an adjective presented is
having a specified presentation, or a presentation with specified properties.
shown
English
Verb
(head)
presented
English
Adjective
(-)
(mathematics, of a group) Having a specified presentation, or a presentation with specified properties.
Verb
(head)
(present)