Pith Number

pith:TEWJWT3J

pith:2013:TEWJWT3J5RXZAR7MNUSYSM5FVP

not attested not anchored not stored refs pending

Polar Coding for Fading Channels

Hongbo Si, O.Ozan Koyluoglu, Sriram Vishwanath

arxiv:1304.3850 v1 · 2013-04-13 · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{TEWJWT3J5RXZAR7MNUSYSM5FVP}

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	2026-05-18T03:28:04.112326Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

992c9b4f69ec6f9047ec6d258933a5abf305c00ce1e0e88ad53780279bc4d135

Aliases

arxiv: 1304.3850 · arxiv_version: 1304.3850v1 · doi: 10.48550/arxiv.1304.3850 · pith_short_12: TEWJWT3J5RXZ · pith_short_16: TEWJWT3J5RXZAR7M · pith_short_8: TEWJWT3J

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/TEWJWT3J5RXZAR7MNUSYSM5FVP \
  | 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: 992c9b4f69ec6f9047ec6d258933a5abf305c00ce1e0e88ad53780279bc4d135

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a44f06a4d0eed8becff92729f1c64c019c8b2aab8efed862173222e01051870d",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2013-04-13T20:59:40Z",
    "title_canon_sha256": "d0319fdf60db4259bb9a4aa1018f4d30bd114e4ea28418148057f3569ab4524c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.3850",
    "kind": "arxiv",
    "version": 1
  }
}