The Upanishads are a collection of ancient Indian philosophical texts that contain discussions on various aspects of reality, including the nature of space.

The Upanishads describe space as an infinite and eternal entity that exists independently of time and matter.

Indian philosophy generally views space and time as interconnected and interdependent aspects of reality, rather than as separate and distinct entities.

Indian philosophy's concept of space differs from Western philosophy's concept of space in several ways, including its emphasis on the subjective nature of space, its interconnectedness with time, and its view of space as an infinite and eternal entity.

Nimbarka, a 13th-century Indian philosopher, is known for his theory of 'spatio-temporal relativity', which posits that space and time are relative to the observer and that there is no absolute frame of reference.

The concept of space in Indian philosophy of history is significant because it provides a framework for understanding the relationship between historical events, helps to explain the cyclical nature of history, and allows for the possibility of multiple interpretations of history.

The concept of space in Indian philosophy of history influences historians' approach to their work by encouraging them to consider the context in which historical events occur, to focus on the long-term patterns and trends in history, and to question the objectivity of historical knowledge.

Bimal Krishna Matilal, a 20th-century Indian philosopher, has written extensively about the concept of space in Indian philosophy, particularly in his book 'The Concept of Space in Indian Philosophy'.

In his book 'The Concept of Space in Indian Philosophy', Matilal argues that the concept of space in Indian philosophy is fundamentally different from the concept of space in Western philosophy, that it has evolved over time, and that it is closely linked to the concept of time.

According to Matilal, some of the key features of the concept of space in Indian philosophy include its emphasis on the subjective nature of space, its interconnectedness with time, and its view of space as an infinite and eternal entity.

Matilal's work on the concept of space in Indian philosophy contributes to our understanding of Indian philosophy as a whole by providing a new perspective on the relationship between Indian philosophy and Western philosophy, helping to bridge the gap between traditional and contemporary Indian philosophy, and shedding light on the historical development of Indian philosophy.

Some of the challenges in studying the concept of space in Indian philosophy include the lack of a single, authoritative text on the subject, the diversity of Indian philosophical traditions, and the difficulty in translating Sanskrit texts into English.

Despite the challenges, it is important to study the concept of space in Indian philosophy because it provides insights into the unique worldview of Indian philosophy, helps us to understand the historical development of Indian thought, and can contribute to our understanding of the relationship between philosophy and science.

In addition to the Upanishads, other Indian philosophical texts that discuss the concept of space include the Bhagavad Gita, Yoga Sutras, and Vedanta Sutras.

The concept of space in Indian philosophy differs from the concept of space in other philosophical traditions, such as Greek philosophy or Chinese philosophy, in several ways, including its emphasis on subjectivity, its interconnectedness with time, and its focus on the inner world.