uddyota the word always refers in grammar to the famous commentary by Nāgeśabhaṭṭa written in the first decade of the 18th century A. D. om the Mahābhāṣyapradīpa of Kaiyaṭa. The appears to be one of the earlier works of Nāgeśa. It is also called Vivaraṇa. The commentary is a scholarly one and is looked upon as a final word re : the exposition of the Mahābhāṣya. It is believed that Nāgeśa wrote 12 Uddyotas and 12 Śekharas which form some authoritative commentaries on prominent works in the different Śāstras. Mahābhāṣya-Pradīpoddyota by Nāgeśa. mahābhāṣya the great commentary. The word is uniformly used by commentators and classical Sanskrit writers for the reputed commentary on Pāṇini's Sūtras and the Vārttikas thereon by Patañjali in the 2nd century B. C. The commentary is very scholarly yet very simple in style, and exhaustive although omitting a number of Pāṇini's rules. It is the first and oldest existing commentary on the literally of Pāṇini, and, in spite of some other commentaries and glosses and other compendia, written later on to explain the Sutras of Panini, it has remained supremely authoritative and furnishes the last and final word in all places of doubt: Pāṇini's Aṣṭādhyāyī. the remarks इति भाष्ये स्थितम्, इत्युक्तं भाष्ये, इत्युक्तमाकरे confer, compare scattered here and there in several Vyaakarana treatises forming in fact, the patent words used by commentators when they finish any chain of arguments. Besides commenting on the Sutras of Paanini, Patanjali, the author, has raised many other grammatical issues and after discussing them fully and thoroughly, given his conclusions which have become the final dicta in those matters. The work, in short, has become an encyclopedic one and hence aptly called खनि or अकर. The work is spread over such a wide field of grammatical studies that not a single grammatical issue appears to have been left out. The author appears to have made a close study of the method and explanations of the SUtras of Paanini given at various academies all over the country and incorporated the gist of those studies given in the form of Varttikas at the various places, in his great work He has thoroughly scrutinized and commented upon the Vaarttikas many of which he has approved, some of which he has rejected, and a few of which he has supplement et cetera, and others Besides the Vaarttikas which are referred to edition , he has quoted stanzas which verily sum up the arguments in explanation of the difficult sUtras, composed by his predecessors. There is a good reason to believe that there were small glosses or commentaries on the SUtras of Paanini, written by learned teachers at the various academies, and the Vaarttikas formed in a way, a short pithy summary of those glosses or Vrttis. . The explanation of the word वृत्तौ साधु वार्तिकम् given by Kaiyata may be quoted in support of this point. Kaiyata has at one place even stated that the argument of the Bhaasyakaara is in consonance with that of Kuni, his predecessor. The work is divided into eighty five sections which are given the name of lesson or आह्लिक by the author, probably because they form the subject matter of one day's study each, if the student has already made a thorough study of the subject and is very sharp in intelligence. a reference to some preceding word, not necessarily on the same page. अह्ला निर्वृत्तम् आह्लिकम्, (the explanation given by the commentatiors).Many commentary works were written on this magnum opus of Patanjali during the long period of twenty centuries upto this time under the names टीका, टिप्पणी, दीपिका, प्रकाशिका, व्याख्या, रत्नावली, स्पूर्ति, वृत्ति, प्रदीप, व्याख्यानं and the like, but only one of them the 'Pradipa' of कैयटीपाध्याय, is found complete. The learned commentary by Bhartrhari, written a few centuries before the Pradipa, is available only in a fragment and that too, in a manuscript form copied down from the original one from time to time by the scribes very carelessly. Two other commentaries which are comparatively modern, written by Naarayanasesa and Nilakantha are available but they are also incomplete and in a manuscript form. Possibly Kaiyatabhatta's Pradipa threw into the background the commentaries of his predecessors and no grammarian after Kaiyata dared write a commentary superior to Kaiyata's Pradipa or, if he began, he had to abandon his work in the middle. The commentary of Kaiyata is such a scholarly one and so written to the point that later commentators have almost identified the original Bhasya with the commentary Pradipa and many a time expressed the two words Bhasya and Kaiyata in the same breath as भाष्यकैयटयोः ( एतदुक्तम् or स्पष्टमेतत् ). confer, compare siddhāntakaumudī a critical and scholarly commentary on the Sutras of Panini, in which the several Sutras are arranged topicwise and fully explained with examples and counter examples. The work is exhaustive, yet not voluminous, difficult yet popular, and critical yet lucid. The work is next in importance to the Mahabhasya in the system of Panini, and its study prepares the way for understanding the Mahabhasya. It is prescribed for study in the courses of Vyakarana at every academy and Pathasala and is expected to be committed to memory by students who want to be thorough scholars of Vyakarana.By virtue of its methodical treatment it has thrown into the back-ground all kindred works and glosses or Vrttis on the Sutras of Panini. It is arranged into two halves, the first half dealing with seven topics ( 1 ) संज्ञापरिभाषा, ( 2 ) पञ्त्वसंधि, ( 3 ) षड्लिङ्ग, ( 4 ) स्त्रीप्रत्यय, ( 5 ) कारक, ( 6 ) समास, ( 7 ) तद्धित, and the latter half dealing with five topics, ( 1 ) दशगणी, ( 2 ) द्वादशप्राक्रिया ( 3 ) कृदन्त ( 4 ) वैदिकी and ( 5 ) स्वर. The author भट्टोजीदीक्षित has himself written a scholarly gloss on it called प्रौढमनेरमा on which, his grandson, Hari Diksita has written a learned commentary named लघुशब्दरत्न or simple शब्दरत्न. The Siddhāntakaumudi has got a large number of commentaries on it out of which, the commentaries प्रौढमनेरमा, बालमनोरमा, (by वासुदेवदीक्षित) तत्त्वबोधिनी and लघुशब्देन्दुशेखर are read by almost every true scholar of Vyakarana. Besides these four, there are a dozen or more commentaries some of which can be given below with their names and authors ( I ) सुबेाधिनी by जयकृष्णमौनि, ( 2 ) सुबोधिनी by रामकृष्णभट्ट ( 3 ) वृहृच्छब्देन्दुशेखर by नागेश, ( 4 ) बालमनेारमा by अनन्तपण्डित, ( 5 ) वैयाकरणसिद्धान्तरहृस्य by नीलकण्ठ, ( 6 ) रत्नार्णव, by कृष्णमिश्र ( 7 ) वैयाकरणसिद्धान्तरत्नाकर by रामकृष्ण, ( 8 ) सरला by तारानाथ,(9) सुमनोरमा by तिरुमल्ल,(10)सिद्वान्तकौमुदीव्याख्या by लक्ष्मीनृसिंह, (11 )सिद्धान्तकौमुदीव्याख्या by विश्वेश्वरतीर्थ, (12) रत्नाकर by शिवरामेन्द्रसरस्वती and (13) प्रकाश by तोलापदीक्षित. Although the real name of the work is वैयाकरणसिद्धान्ततकौमुदी, as given by the author, still popularly the work is well known by the name सिद्धान्तकौमुदी. The work has got two abridged forms, the Madhyakaumudi and the Laghukaumudi both written by Varadaraja, the pupil of Bhattoji Diksita.