Pith Number

pith:ICOUM5A3

pith:2012:ICOUM5A32CER7J4QQABMQFDD6U

not attested not anchored not stored refs pending

A new information metric and a possible higher bound for a class of measurements in the Quantum Estimation Problem

Demetris P.K. Ghikas, Fotios Oikonomou

arxiv:1210.1977 v1 · 2012-10-06 · quant-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ICOUM5A32CER7J4QQABMQFDD6U}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

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	2026-05-18T03:43:51.428900Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

409d46741bd0891fa7908002c81463f51bd5177984374cb091bc6558b5a91db6

Aliases

arxiv: 1210.1977 · arxiv_version: 1210.1977v1 · doi: 10.48550/arxiv.1210.1977 · pith_short_12: ICOUM5A32CER · pith_short_16: ICOUM5A32CER7J4Q · pith_short_8: ICOUM5A3

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/ICOUM5A32CER7J4QQABMQFDD6U \
  | 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: 409d46741bd0891fa7908002c81463f51bd5177984374cb091bc6558b5a91db6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3a3ca1ad7e068e8237a81c27bede7c9e8545c8eb2a0e58acd79abe1b566d4b28",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2012-10-06T17:08:10Z",
    "title_canon_sha256": "25f2397fd100619fd12708abcf6a5c38c2cb2ea1dcd2a85642c54ab85f3468c1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1210.1977",
    "kind": "arxiv",
    "version": 1
  }
}