id keyword issue-58 οΏ½ οΏ½ issue-58 𝑋𝑋2 π‘Œπ‘Œ issue-58 𝑋𝑋1 𝑋𝑋2 issue-58 οΏ½ 𝑋𝑋𝑋𝑋 issue-58 𝑋𝑋 οΏ½ issue-58 βˆ’ οΏ½ issue-58 𝑋𝑋𝑛𝑛 π‘Œπ‘Œ issue-58 βˆ†π‘”π‘” π‘Œπ‘Œ issue-58 𝑖𝑖=1 π‘Œπ‘Œ issue-58 𝑇𝑇 𝐢𝐢𝐢𝐢 issue-58 οΏ½ 𝑔𝑔1𝑔𝑔0 issue-58 𝑋𝑋3 issue-58 οΏ½ πœ€πœ€π·π·