2. Linear Systems Flashcards

1
Q

Lemma 2.2 (Matrix Exponential)
and definition.

Proof.

A
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2
Q

Lemma 2.3
e^{At} is… and ….

Proof.

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3
Q

Corollary 2.4
Solution to linear system IVP.

Proof.

A
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4
Q

Lemma 2.5
e^{P^{-1}AP} = …

Proof.

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5
Q

Lemma 2.7
If AB = BA then…

Proof.

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6
Q

Corollary 2.8
e^{-A} = …

Proof.

A
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7
Q

Theorem 2.9 (Jordan Normal Form for 2x2 Matrices)

A
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8
Q

Theorem 2.10 (Instability)

Proof.

A
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9
Q

Proposition 2.16
Let A = diag{A_1, …, A_m}, then ||A|| = …

Proof?

A
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10
Q

Corollary 2.17
Suppose A has Jordan normal form J = diag{J_1, …, J_k}, then…

Proof.

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11
Q

Theorem 2.18 (Stability I)

Proof.

A
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12
Q

Theorem 2.19 (Stability II)

Proof.

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13
Q

Remark 2.20
Deducing eigenvalue signs from trace and det.

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14
Q

Phase portrait: node.

A
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15
Q

Phase portrait: saddle point.

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16
Q

Phase portrait: star.

A
17
Q

Phase portrait: improper node.

A
18
Q

Phase portrait: centre and foci.

A