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{
  "uri": "at://did:plc:b345axjoz4cdvc7l3v3f2mm6/app.bsky.feed.post/3lcdtcp7kps2f",
  "cid": "bafyreie7xkdagbsfr7ysbamjj4bfsz3jxl3657epa7bw4ay7qirxf5du4u",
  "value": {
    "text": "In the model of Gomory-Johnson (1972), the minimal valid functions are exactly the ℤ-periodic subadditive functions 𝜋∶ ℝ⟶ℝ₊ with 𝜋(0) = 0 and 𝜋(𝑥) + 𝜋(𝑓 − 𝑥) = 1 (\"symmetry\") for all 𝑥 ∊ ℝ. (Here 𝑓 ∊ ℝ is the fixed right-hand side of the model.)",
    "$type": "app.bsky.feed.post",
    "reply": {
      "root": {
        "cid": "bafyreicgphst3flsx2qnxjm77ouwx7chfxlioyee7rijnblvszng4k2dky",
        "uri": "at://did:plc:b345axjoz4cdvc7l3v3f2mm6/app.bsky.feed.post/3lcdsh6jxl62o"
      },
      "parent": {
        "cid": "bafyreih7q45iami7qpfiqtr4lt72i6kkjxaizq42uaqvdu4is3oqoenjha",
        "uri": "at://did:plc:b345axjoz4cdvc7l3v3f2mm6/app.bsky.feed.post/3lcdszjgyqf2s"
      }
    },
    "createdAt": "2019-11-18T19:56:43Z"
  }
}