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1 1 I created my React app with create-react-app app_name --typescript . Since Typescript doesn't support NODE_PATH. I'm trying to use baseUrl in tsconfig.json . However, every time running yarn start after putting "baseUrl": "src" in "compilerOptions" , the baseUrl gets gone. I feel like yarn start resets tsconfig.json . How can I stop it to reset the file? **tsconfig.json** { "compilerOptions": { "target": "es6", "allowJs": true, "skipLibCheck": false, "esModuleInterop": true, "allowSyntheticDefaultImports": true, "strict": false, "forceConsistentCasingInFileNames": true, "module": "esnext", "moduleResolut

0 $begingroup$ If I have undefined sets $A, B, C$ . How can I prove that this statement is true? $$ (A cap C = B cap C land A cup C = B cup C) implies A= B $$ I absolutely do not know how to start or what to use. Please try to advise me or how to proceed. Thanks elementary-set-theory share | cite | improve this question edited Dec 12 '18 at 1:24 Martin Sleziak 44.8k 9 118 272 asked Dec 10 '18 at 12:42 Marek Marke Marek Marke 26 6