First of all, it is “linga”, not “lingu”

1) Every incident in Ramayana / Mahabharata has two meanings – straight-forward meaning and divine meaning. Straight meaning / reason is Rama wanted to show to the world that every human should worship Shiva, he being the manoniyamaka devaru. Divine meaning / reason is to delude the tamasik people into thinking that Shiva is superior to Rama.

2) Whatever you meant by “Padmanabha swami worships Shiva linga”, it is not a pramANa to come to any conclusion.

3) The correct karanyAsa mantra as per Shivalli Madhwa Rigveda sampradAya is – Om tatsavituH anguShThAbhyAm namaH Om vareNyam tarjaneebhyAm namaH …
And, Gayatri mantra does not refer to trimUrtis, but refers to sUrya-antargata shreeman Narayana (we have the dhyAna mantra to this effect.)

Further it should be noted that one cannot throw random questions on philosophy and get correct/convincing answers in this forum. Like how an LKG student cannot understand complex physics hypotheses, a beginner cannot appreciate/grasp the intricate hidden meanings of Vedanta. The answerer of the questions (myself here) is also not qualified to handle the queries. janmAntara sAdhane through guru-shishya relationship is required.

1)i am also eager to know the reason for Sri rama worshiping Shiva lingu in Rameshwara. why did he not worship Narayana?

2) In Thiruvananthapuram, Padma nabha swamy is also Worshiping Shiva lingu.
My point is if Narayana is the ultimate god, why did he worship Shiva Lingu?

2)Even before doing Gayathri japa during sandhya vandane, We do karanyasa saying “thath savithuhu brahmathmane angushtabhyanamaha, varenyam vishnurathmane tharjanebhyanamaha,…” this is according to Rig veda krama. My point is there is some thing higher than Thrimurthi to which the gayatri mantra refers to. I feel this should be The Shiva Lingu or Samba Sadashiva which is explained in the Maha Shiva Purana. Please tell your opinion.

With lots of respect and love,
vinay

Shri Hari has deputed different devatas as parivAra devatas and tattvAbhimAni devatas in different kakShes with tAratamya. It is His rule and divine icche that He will Bless us only if we come through proper channel of tattvAbimAni antargata mukhyaprANantargata lakShmi nArAyaNa. So, we have no choice here to make!

Further, among all devatas, Ganapathi is known as kShipraprasAda because he will Bless us sooner than any other devatas. Shri Hari and other devatas may wait and check our determination, intensity of bhakti, etc. The waiting period may be one month, one year, ten years or may even extend into next janmas. But with Ganapathi it is not like that. If prayed properly for divine purpose, Ganesha will grant our wishes very quickly.

Further, however, the Vedic mantras “nishuseeda ganapathe” and “gananam twa” are referring to the Supreme God Sri Hari only, who is the Lord of entire jeeva gaNas. Listen to Sri Bannanje pravachanas for more details.

also will grant us what we want, but it need not be immediate.

You asked: “i am eager to know whether worshiping Lord Ganesha before worshiping Shri hari is mandatory”

I got the following info from Sri Bannanje’s pravachanas:

ಪ್ರತೀ ಪೂಜೆಯಲ್ಲಿ ಮೊದಲು ಗಣಪತಿ ಪ್ರಾರ್ಥನೆ ಮಾಡುತ್ತೇವೆ. ಏಕೆಂದರೆ ಗಣಪತಿ ಆಕಾಶದ ದೇವತೆ ಹಾಗು ಈ ಆಕಾಶ ಭಗವಂತನ ನಾಭಿಯಿಂದ ಸೃಷ್ಟಿಯಾಗಿದೆ, ಆದ್ದರಿಂದ ಗಣಪತಿ ನಮ್ಮ ನಾಭಿ ದೇವತೆ.
ನಾಭ್ಯ ಆಸೀದಂತರಿಕ್ಷಂ ಶೀರ್ಷ್ನೋಧ್ಯೋ ಸಮವರ್ತತಃ |
ಪದ್ಭ್ಯಾಂ ಭೂಮೀರ್ ದಿಶ ಶ್ರೋತ್ರಾತ್ ತತಾ ಲೋಕಾ ಅಕಲ್ಪಯನ್ ||
ನಮ್ಮ ನಾಭಿಯ ಸಮೀಪ ಇರುವ ಮೂರು ಚಕ್ರಗಳು ಮೂಲಾಧಾರ, ಸ್ವಾಧಿಷ್ಟಾನ ಹಾಗು ಮಣಿಪುರ. ನಾಭಿಯಿಂದ ಮೇಲಕ್ಕೆ ಹೃತ್ಕಮಲದಲ್ಲಿ ನಿಜವಾದ ಸಾಧನೆಯ ಅನಾಹತ ಚಕ್ರವಿದೆ. ಮೂಲಾಧಾರ, ಸ್ವಾಧಿಷ್ಟಾನ ಹಾಗು ಮಣಿಪುರ ಚಕ್ರಗಳನ್ನು ಮೀರಿ ಹೃದಯವನ್ನು ಪ್ರವೇಶಿಸಬೇಕಾದರೆ ನಾಭಿಯ ಬಾಗಿಲನ್ನು ಗಣಪತಿ ತೆರೆಯಬೇಕು. ಅದಕ್ಕಾಗಿ ನಾವು ಗಣಪತಿಯಲ್ಲಿ ಮೊತ್ತಮೊದಲಿಗೆ ಪ್ರಾರ್ಥನೆ ಮಾಡುತ್ತೇವೆ. ಪ್ರತೀ ಯಜ್ಞದ ಮೊದಲು ಗಣಪತಿ ಮಂಡಲ ಬರೆದು ಪೂಜಿಸಿ ಆನಂತರ ಯಜ್ಞ ಪ್ರಾರಂಭಿಸುತ್ತಾರೆ. ಗಣಪತಿ ನಾಭಿಯ ಬಾಗಿಲನ್ನು ತೆರೆದಾಗ ಹೃತ್ಕಮಲ ತಾನೇ-ತಾನಾಗಿ ತೆರೆದುಕೊಳ್ಳುತ್ತದೆ. ಈ ಸ್ಥಿತಿಯನ್ನು ‘ವೃಷಾಹ’ ಎನ್ನುತ್ತಾರೆ.

English has its limitations while explaining vedanta . Read “cannot” as “need not”.

There are infinite sattvik and tamasik souls. So it takes infinite kalpas for all of them to reach their destination. shristi sthiti laya are never ending processes.

Even when we worship Lord Ganesha, we should think of Shree Vishwambhara roopa paramatma residing in Ganesha and receiving our offerings.