What is the lesson of «رَحْمٰن»?

Conclusion: Tajwīd, Waqf, ʿUthmānic Rasm and Qirāʾāt

• It is iqlāb of nūn sākinah
• It always requires saktah
• Omission of a written alif does not erase the transmitted long vowel
• Its nūn is silent