Ardha Pudgal Paravartan is a Jain karmic term. It means the “half” period of a Pudgal Paravartan.

• What it is: In Jain karma theory, a Pudgal Paravartan is a complete cycle of bonding and transformation of karmic matter with a jiva (the soul). Ardha Pudgal Paravartan refers to the half-duration of that cycle. During this half-period, some karmas may still bind the soul, but the time frame is limited and special spiritual conditions can lead toward liberation.
• Why it matters: When a jiva reaches the right spiritual status (such as samyak darshan), this half-period can still culminate in liberation within the overall arc of that karma cycle. The concept underscores how long the karmic processes can last and when moksha can become possible.
• Traditions: Both Digambar and Shwetambar traditions recognize the framework of Pudgal Paravartan and its subdivisions. Details and emphases can vary in commentaries, but the basic idea of a half-duration stage is acknowledged in Jain karmic theory.

If you’d like, I can also explain how this fits with other stages of Pudgal Paravartan and the general path to moksha in Jainism.