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lean4game/server/adam/Adam/Levels/LinearAlgebra/L03_VectorNotation.lean

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import Adam.Metadata
2 years ago
import Mathlib.Data.Real.Basic -- definiert ``
import Mathlib.Algebra.Module.Pi -- definiert `Module (fin 2 → )`
import Mathlib.Data.Fin.VecNotation
import Mathlib.Tactic.FinCases
Game "Adam"
2 years ago
World "Module"
Level 3
Title "Konkrete Vektorräume"
Introduction
"
Beachte dass Skalarmultiplikation mit `•` geschrieben wird, und nicht mit `*`!
"
Statement
""
: 5 • ![ (2 : ), 5 ] + ![ 1, 0 ] = ![11, 25] := by
funext i
fin_cases i <;>
simp <;>
ring