Question juridique clé
Whether the federal appeal satisfied the formal requirements of Art. 42 BGG.
Solution extraite
No; the appeal did not contain a legally sufficient request or adequately address the reasoning of the lower court.
Motifs extraits
The appellant failed to engage concretely with the cantonal court's findings on the minimum contribution period and did not show any legal error or manifestly incorrect factual findings under Arts. 95 ff. and 97 BGG.