Pith Number

pith:7SIFUZEW

pith:2015:7SIFUZEWQ5KBTM5PVOEWMXONO5

not attested not anchored not stored refs pending

Network Topology Identification using PCA and its Graph Theoretic Interpretations

Aravind Rajeswaran, Shankar Narasimhan

arxiv:1506.00438 v2 · 2015-06-01 · cs.LG · cs.DM · cs.SY · stat.ME

Open paper page JSON Open Graph Bundle Merged state What is a Pith Number?

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T01:22:14.471184Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc905a6496875419b3afab89665dcd7778a35cf60df583c16c6118aca99b6a8d

Aliases

arxiv: 1506.00438 · arxiv_version: 1506.00438v2 · doi: 10.48550/arxiv.1506.00438 · pith_short_12: 7SIFUZEWQ5KB · pith_short_16: 7SIFUZEWQ5KBTM5P · pith_short_8: 7SIFUZEW

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/7SIFUZEWQ5KBTM5PVOEWMXONO5 \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: fc905a6496875419b3afab89665dcd7778a35cf60df583c16c6118aca99b6a8d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "526b6b03ac8303c3a6bcb8f3e9befc00f6b9d333b9186f92c9508c577490008b",
    "cross_cats_sorted": [
      "cs.DM",
      "cs.SY",
      "stat.ME"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2015-06-01T10:57:00Z",
    "title_canon_sha256": "cf7e56dee7d3428beb469f925000a7b3ca2af2c678f8d9ffaa9f917745d55102"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1506.00438",
    "kind": "arxiv",
    "version": 2
  }
}