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chore: reorganize all image files and linted documents (#80)
* [PUBLISHER] upload files #62 * [PUBLISHER] upload files #63 * [PUBLISHER] upload files #64 * [PUBLISHER] upload files #65 * [PUBLISHER] upload files #66 * [PUBLISHER] upload files #67 * PUSH NOTE : test-document.md * PUSH NOTE : 09. Lp Functions.md * PUSH ATTACHMENT : mt-09.png * PUSH NOTE : 03. Measure Spaces.md * PUSH ATTACHMENT : mt-03.png * PUSH NOTE : 08. Comparison with the Riemann Integral.md * PUSH ATTACHMENT : mt-08.png * PUSH NOTE : 07. Dominated Convergence Theorem.md * PUSH ATTACHMENT : mt-07.png * PUSH NOTE : 06. Convergence Theorems.md * PUSH ATTACHMENT : mt-06.png * PUSH NOTE : 05. Lebesgue Integration.md * PUSH ATTACHMENT : mt-05.png * PUSH NOTE : test-document.md * [PUBLISHER] upload files #68 * [PUBLISHER] upload files #69 * PUSH NOTE : 08. Comparison with the Riemann Integral.md * PUSH ATTACHMENT : mt-08.png * PUSH NOTE : 02. Construction of Measure.md * PUSH ATTACHMENT : mt-02.png * DELETE FILE : _posts/2023-09-09-test-document.md * DELETE FILE : _posts/Mathematics/Measure Theory/2023-09-09-test-document.md * [PUBLISHER] upload files #70 * PUSH NOTE : Rules of Inference with Coq.md * PUSH NOTE : 수학 공부에 대한 고찰.md * PUSH NOTE : 04. Measurable Functions.md * PUSH ATTACHMENT : mt-04.png * PUSH NOTE : 07. Dominated Convergence Theorem.md * PUSH ATTACHMENT : mt-07.png * PUSH NOTE : 08. Comparison with the Riemann Integral.md * PUSH ATTACHMENT : mt-08.png * PUSH NOTE : 05. Lebesgue Integration.md * PUSH ATTACHMENT : mt-05.png * PUSH NOTE : 03. Measure Spaces.md * PUSH ATTACHMENT : mt-03.png * PUSH NOTE : 09. Lp Functions.md * PUSH ATTACHMENT : mt-09.png * PUSH NOTE : 06. Convergence Theorems.md * PUSH ATTACHMENT : mt-06.png * PUSH NOTE : 02. Construction of Measure.md * PUSH ATTACHMENT : mt-02.png * PUSH NOTE : 01. Algebra of Sets and Set Functions.md * PUSH ATTACHMENT : mt-01.png * PUSH NOTE : 블로그 이주 이야기.md * PUSH ATTACHMENT : blog-logo.png * PUSH ATTACHMENT : github-publisher.png * PUSH NOTE : 05. Services - Enabling Clients to Discover and Talk to Pods.md * PUSH ATTACHMENT : k8s-05.jpeg * PUSH NOTE : 18. Extending Kubernetes.md * PUSH ATTACHMENT : k8s-18.jpeg * PUSH NOTE : 11. Understanding Kubernetes Internals.md * PUSH ATTACHMENT : k8s-11.jpeg * PUSH NOTE : 04. Replication and Other Controllers - Deploying Managed Pods.md * PUSH ATTACHMENT : k8s-04.jpeg * PUSH NOTE : 10. StatefulSets - Deploying Replicated Stateful Applications.md * PUSH ATTACHMENT : k8s-10.jpeg * PUSH NOTE : 02. First Steps with Docker and Kubernetes.md * PUSH ATTACHMENT : k8s-02.jpeg * PUSH NOTE : 06. Volumes - Attaching Disk Storage to Containers.md * PUSH ATTACHMENT : k8s-06.jpeg * PUSH NOTE : 12. Securing the Kubernetes API Server.md * PUSH ATTACHMENT : k8s-12.jpeg * PUSH NOTE : 07. ConfigMaps and Secrets - Configuring Applications.md * PUSH ATTACHMENT : k8s-07.jpeg * PUSH NOTE : 13. Securing Cluster Nodes and the Network.md * PUSH ATTACHMENT : k8s-13.jpeg * PUSH NOTE : 09. Deployments - Updating Applications Declaratively.md * PUSH ATTACHMENT : k8s-09.jpeg * PUSH NOTE : 17. Best Practices for Developing Apps.md * PUSH ATTACHMENT : k8s-17.jpeg * PUSH NOTE : 16. Advanced Scheduling.md * PUSH ATTACHMENT : k8s-16.jpeg * PUSH NOTE : 08. Accessing Pod Metadata and Other Resources from Applications.md * PUSH ATTACHMENT : k8s-08.jpeg * PUSH NOTE : 15. Automatic Scaling of Pods and Cluster Nodes.md * PUSH ATTACHMENT : k8s-15.jpeg * PUSH NOTE : 01. Introducing Kubernetes.md * PUSH ATTACHMENT : k8s-01.jpeg * PUSH NOTE : 03. Pods - Running Containers in Kubernetes.md * PUSH ATTACHMENT : k8s-03.jpeg * PUSH NOTE : 14. Managing Pods' Computational Resources.md * PUSH ATTACHMENT : k8s-14.jpeg * [PUBLISHER] upload files #71 * PUSH NOTE : test-document.md * PUSH NOTE : test-document.md * PUSH ATTACHMENT : test-image.png * DELETE FILE : assets/img/posts/test/test-image.png * [PUBLISHER] upload files #72 * PUSH NOTE : test-document.md * PUSH ATTACHMENT : test-image.png * DELETE FILE : assets/img/posts/test/test-image.png * [PUBLISHER] upload files #73 * PUSH NOTE : test-document.md * PUSH ATTACHMENT : test-image.png * chore: remove test files * [PUBLISHER] upload files #74 * PUSH NOTE : 01. Algebra of Sets and Set Functions.md * PUSH ATTACHMENT : mt-01.png * DELETE FILE : assets/img/posts/Mathematics/Measure Theory/mt-01.png * [PUBLISHER] upload files #76 * PUSH NOTE : 01. Algebra of Sets and Set Functions.md * PUSH ATTACHMENT : mt-01.png * [PUBLISHER] upload files #77 * PUSH NOTE : 09. Lp Functions.md * PUSH ATTACHMENT : mt-09.png * PUSH NOTE : 08. Comparison with the Riemann Integral.md * PUSH ATTACHMENT : mt-08.png * PUSH NOTE : 07. Dominated Convergence Theorem.md * PUSH ATTACHMENT : mt-07.png * PUSH NOTE : 06. Convergence Theorems.md * PUSH ATTACHMENT : mt-06.png * PUSH NOTE : 05. Lebesgue Integration.md * PUSH ATTACHMENT : mt-05.png * PUSH NOTE : 04. Measurable Functions.md * PUSH ATTACHMENT : mt-04.png * PUSH NOTE : 03. Measure Spaces.md * PUSH ATTACHMENT : mt-03.png * PUSH NOTE : 01. Algebra of Sets and Set Functions.md * PUSH ATTACHMENT : mt-01.png * chore: remove images * [PUBLISHER] upload files #78 * PUSH NOTE : 09. Lp Functions.md * PUSH ATTACHMENT : mt-09.png * PUSH NOTE : 08. Comparison with the Riemann Integral.md * PUSH ATTACHMENT : mt-08.png * PUSH NOTE : 07. Dominated Convergence Theorem.md * PUSH ATTACHMENT : mt-07.png * PUSH NOTE : 06. Convergence Theorems.md * PUSH ATTACHMENT : mt-06.png * PUSH NOTE : 05. Lebesgue Integration.md * PUSH ATTACHMENT : mt-05.png * PUSH NOTE : 04. Measurable Functions.md * PUSH ATTACHMENT : mt-04.png * PUSH NOTE : 03. Measure Spaces.md * PUSH ATTACHMENT : mt-03.png * PUSH NOTE : 01. Algebra of Sets and Set Functions.md * PUSH ATTACHMENT : mt-01.png * PUSH NOTE : 18. Extending Kubernetes.md * PUSH ATTACHMENT : k8s-18.jpeg * PUSH NOTE : 17. Best Practices for Developing Apps.md * PUSH ATTACHMENT : k8s-17.jpeg * PUSH NOTE : 16. Advanced Scheduling.md * PUSH ATTACHMENT : k8s-16.jpeg * PUSH NOTE : 15. Automatic Scaling of Pods and Cluster Nodes.md * PUSH ATTACHMENT : k8s-15.jpeg * PUSH NOTE : 14. Managing Pods' Computational Resources.md * PUSH ATTACHMENT : k8s-14.jpeg * PUSH NOTE : 13. Securing Cluster Nodes and the Network.md * PUSH ATTACHMENT : k8s-13.jpeg * PUSH NOTE : 12. Securing the Kubernetes API Server.md * PUSH ATTACHMENT : k8s-12.jpeg * PUSH NOTE : 11. Understanding Kubernetes Internals.md * PUSH ATTACHMENT : k8s-11.jpeg * PUSH NOTE : 10. 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Introducing Kubernetes.md * PUSH ATTACHMENT : k8s-01.jpeg * [PUBLISHER] upload files #79 * PUSH NOTE : 02. Construction of Measure.md * PUSH ATTACHMENT : mt-02.png
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@@ -8,7 +8,9 @@ title: "04. Measurable Functions"
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date: "2023-02-06"
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github_title: "2023-02-06-measurable-functions"
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image:
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path: /assets/img/posts/mt-04.png
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path: /assets/img/posts/Mathematics/Measure Theory/mt-04.png
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attachment:
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folder: assets/img/posts/Mathematics/Measure Theory
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---
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Lebesgue integral을 공부하기 전 마지막 준비입니다. Lebesgue integral은 다음과 같이 표기합니다.
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@@ -153,7 +155,7 @@ $$s(x) = \sum_ {i=1}^{n} c_i \chi_ {E_i}(x).$$
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여기서 $E_i$에 measurable 조건이 추가되면, 정의에 의해 $\chi_ {E_i}$도 measurable function입니다. 따라서 모든 measurable simple function을 measurable $\chi_ {E_i}$의 linear combination으로 표현할 수 있습니다.
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아래 정리는 simple function이 Lebesgue integral의 building block이 되는 이유를 잘 드러냅니다. 모든 함수는 simple function으로 근사할 수 있습니다.
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@@ -206,7 +208,5 @@ $$f_n + g_n \rightarrow f + g, \quad f_ng_n \rightarrow fg$$
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이고 measurability는 극한에 의해 보존되므로 $f+g, fg$는 measurable이다.
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[^1]: 일반적으로는 ‘measurable set의 preimage가 measurable이 될 때’로 정의합니다.
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[^2]: 참고로 $\infty - \infty$ 의 경우는 정의되지 않으므로 생각하지 않습니다.
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[^3]: 이 정의에서 $\infty - \infty$ 가 나타나지 않음에 유의해야 합니다.
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