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#h-a #TODO

DEFINITION

Type of Operator that works ~ ${\mathbb{R}}^n$ Parabole>0
WHEN:

• Vector $\overrightarrow{v}\ne 0$

IF:

• $⟨A\cdot \overrightarrow{v}|\overrightarrow{v}⟩>0$⇒

$A$ is "Elliptic Operator"

TRANSLATION

$\mathrm{\exists }\alpha >0$: $A=$$\mathbb{1}$ $\iff$ $\sum ^n{a}_{j,k}\cdot q_j\cdot q_k$ = $⟨A\cdot q|q⟩$ $⩾$ $\alpha \cdot \parallel q{\parallel }^2$ $\mathrm{\forall }x\in \mathrm{\Omega }$ #ASK

#h-t LINKED